Lemon tree pests and diseases

Citrus limon

What are the lemon tree diseases? The lemon tree is one of the most loved fruit trees in orchards: it is a citrus that produces a large number of fruits, which have a pleasant enough acid flavor to give an exquisite flavor to different dishes. In addition, it does not require special attention, although it may have some other problem.

But what are the pests and lemon tree diseases? And, more important if possible, how are they cured?

Buy your lemon tree now. Click here.

Lemon tree pests


Minador, one of the diseases of the lemon tree

The lemon tree can be attacked by a miner insect, which mainly affects the young leaves. This insect forms galleries as it feeds. Consequently, brown spots will appear and the leaves will wind up until they finish withering and falling.

It is fought with Neem oil what can you buy here ready to use.

Neem oil
Related article:
Prevent your plants from pests with Neem Oil


Aphids, one of the pests of the lemon tree

Aphids appear when there is high humidity and temperatures remain above 15ºC. They are very small insects, less than 0,5cm long, that perch on flower buds, buds y leaves, which turn yellow. Thus, the tree cannot develop new leaves, and the fruits end up developing deformations which means that they cannot be consumed.

It can be prevented by spraying the plant from time to time, but if you already have aphids, it will be necessary to treat it with Neem Oil or one of the following products:

Cottony mealybug

Mealybug on lemon tree

The cottony mealybug loves summer; that is, high temperatures and a dry environment. In these months there are many plants that take advantage of the good weather to grow as much as they can before the cold arrives. But any mistake in its cultivation will cause these parasites to affect the lemon tree, finding them on the underside of the leaves and on the stems.

You can combat it by making this ecological insecticide:

  • Mix equal parts water and pharmacy alcohol in a liter and a half bottle.
  • Then add a small (coffee) spoonful of dishwasher.
  • Cover the bottle, and stir well to mix.
  • Finally, fill a sprayer, and treat your lemon tree.

Or if you prefer a chemical product, these can help:

Red spider

Red spider

Red spider It is a mite of about 0,5 cm of red color that is favored by the hot and dry environment of summer. It produces cobwebs thanks to which it can go from one leaf to another. While it is not an extremely dangerous pest, it greatly weakens plants because it feeds on their cells.

To avoid it and / or to control it, It is recommended to use a yellow chromatic trap that you will place near the tree. If the pest is widespread, it is best to treat with acaricides, or with diatomaceous earth (for sale here) if we prefer to use natural products.

Lemon tree diseases

alternaria alternata

alternaria alternata

It is caused by the Alternaria fungus. It is characterized by weakening the tree until it causes the death of both the leaves and the stems. Fast forward, so it is important to prevent by avoiding excess watering.

Watering the kumquat has to be frequent
Related article:
How to water the plants correctly?

It can also be treated with a fungicide, like these that are ready for use:

Sadness virus

It is the most serious disease that citrus fruits can have, because is capable of killing them in a matter of a few weeks or months. It is spread mainly by aphids, and causes a wide variety of symptoms, such as out-of-season flowering, weakening of the tree, little or no growth.

There's no cure. Unfortunately when a tree has this virus, what you must do is cut it down and burn it.



It is a disease caused by the citrus exocortis viroid (CEVd) that it causes the appearance of scales and vertical cracks in the bark, as well as yellow spots on the greener shoots and dwarfism.

The only treatment that exists is cut down the affected tree and burn it so that it cannot transmit the disease to other specimens. As a preventive measure, you have to buy virus-free lemon trees and grafts that are not susceptible to exocortis and use disinfected pruning tools.


penicillium in orange

It is the typical greenish or white mold that is seen on fallen fruit. It is caused by the fungus penicillium italicum, which causes circular mold patches to appear on the shell. Fortunately, it is well treated with copper-containing fungicides, like the one you can buy here. Dilute 30 grams in 10 liters of water, and spray the plant to combat the disease.



It is a disease transmitted by a virus that causes the appearance of scales on branches, trunk twigs. In Spain it is not fatal, but in other countries it can end the life of the tree in a few months.

You can intuit that your lemon tree has been affected if you notice irregular areas, if the crust seems to be detached and / or if it has gummosis (gum exudation).

There is no definitive cure; however, you can scrape off diseased areas in late spring and coat with 65% Zineb.

Other problems

The lemon tree is a relatively resistant citrus, very easy to care for that produces a large quantity of fruits. However, sometimes it can have other problems that have nothing to do with pests or diseases, but with some neglect that we have had.

So you know what to do Below we tell you what are those other problems you may have and how to solve them:

  • Yellow sheets: if the green nerves are seen, it is due to lack of iron, which can be given quickly with fertilizers rich in this mineral; otherwise, the tree is receiving more water than it needs and, therefore, the frequency of irrigation must be reduced.
  • Leaves that lose color: lack of light. Place in a brighter area to regain their natural color.
  • Fall of leaves: They can be for various reasons, such as a sudden change in temperature (for example, the one that occurs when you take it from the nursery to your garden), due to being exposed to drafts, due to lack of water, or due to natural death ( the leaves have a limited life expectancy, so they fall as they grow new). In principle, there is no need to worry excessively. You just have to keep the lemon tree well watered, and put a mulch of leaves or pine bark if you have recently had it, and that's it. If you have it indoors, keep it away from drafts so that its situation does not worsen.
  • The plant does not grow: if it is in a pot, it is because its roots have run out of space and it is time to transplant it to another one at least 4 centimeters wider during spring, when temperatures, both maximum and minimum, are above 15ºC; if it is in the garden, it is most likely that it lacks compost. As its fruits have culinary uses, you should use organic products, such as herbivorous animal manure or guano, to fertilize your tree.

Hopefully you can enjoy your lemon tree. And if you need a new lemon tree you can buy it from here.

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  1.   Darcy said

    I have some lemon trees, and they have a plague, similar to ticks, they are miniature, they adhere to the skin and itch a lot. Please, what are plants called and how are they cured?

    1.    Monica Sanchez said

      Hi Darcy.
      They are mealybugs. You can remove them by hand, with a swab from the ears dipped in pharmacy alcohol, or with pyrethrins.
      A greeting.

      1.    Pablo said

        Hello Monica, I tell you that I have a lemon tree and the pests you name are just like the ones that my lemon tree has: mining insect, cottony mealybug. In addition, some lemons are like split on one side and become embicured. How to combat both pests? 20 days ago, I sprayed it with a «systemic glex» product. If you give me your email I can send you photos of how the leaves of the tree are.
        Thank you very much for your great contribution

        1.    Sofia F. Alonso said

          Hello Monica! I have a 4 season lemon tree! He gave me the first batch of lemons this year, I have several queries:
          1-how often do they give lemons?
          2- some of its leaves have dry parts, others have holes in the dry part and a couple are twisted and others have dry spots. (Dry = brownish)
          I have photos but I don't know how to upload them in this comment! Hopefully you can understand the explanation hehe ..

          Thank you very much

          1.    Monica Sanchez said

            Hello Sofia.
            1.- They give lemons once a year 🙂 Once they start, it is normal for each season to bear fruit again, so you don't have to worry about that.
            2.- Are the leaves that are dry or that are getting dry the lower ones? If so, it is normal, as the leaves die as new ones emerge. But that some have holes that is no longer so good. Have you checked if it has any plagues? Now that it's fall you can treat it with potassium soap, or in winter with winter insecticidal oil that will prevent the problem from worsening.

            If you have any further questions, ask 🙂


        2.    maguaro said

          Hello, I am maguaro from the Dominican Republic, I have a lemon tree vin el minador, how to combat it, a home remedy or that I buy in the store, thank you.

          1.    Monica Sanchez said

            Hello Maguaro.
            You can treat it with insecticides whose active ingredient is Abamectin, or with home remedies. Here You have more information.

    2.    yilmerd said

      Question: I have a 3-year-old orange tree but recently a branch dried up and the one that remains looks healthy until it gave flowers. What will happen is it going to dry or what would happen?

      1.    Monica Sanchez said

        Hi Yilmerd.
        Have you checked if it has any plagues? It is not at all strange that a branch dries up, since over time they die as new ones come out, but it does not hurt to see if it has any insects or diseases.

    3.    Bill said

      Hello, I have a four-season lemon tree that is giant and produces a huge amount, it is twelve years old but for two years I have been observing that part of its branches turn yellow, the leaves and the lemons grow smaller, they recommended that I put iron on it, which I did ago Almost a year now but the plant is still the same I would like to know what to do because the plant is like this in a third almost and I am afraid that it will die the fruits are impeccable nothing more than there is a lot of difference in size between the part with healthy leaves and those that They are in the area of ​​yellow leaves please someone guide me what to do to cure my lemon tree. Thanks

      1.    Monica Sanchez said

        Hi Guillermo.

        The contribution of iron has to be regular, every 15-20 days, and throughout the life of the tree.

        Another option is to pay it to alternate months (one yes, another no) with a specific fertilizer for fruit trees (like this one they sell here), which already contains iron in an adequate quantity for this type of plant. Of course, you have to follow the instructions specified on the packaging.



    Hello, I have a lemon tree that on its branches or stems, as well as on its leaves, has a kind of dark brown or brownish-black fungus and white spots. I don't know what kind of plague it is or how to fight it to save the life of my lemon tree. What I can do?
    Thank you.
    Oscar Hernandez

    1.    Monica Sanchez said

      Hello Oscar.
      Do the spots on your tree look like these?
      If so, you have a fungus called Alternaria.
      You can fight it with zineb.
      If it isn't, if you want to upload an image to tinypic or imageshack, copy the link here and I'll tell you.
      A greeting.

  3.   federico said

    good afternoon I have a big lemon tree! and I have noticed that the new leaves will shrivel as if they lack water! its color is intense green, and some brown spots appear on the lemons like little flecks! What can it be and how do I fight it? From already thank you very much

    1.    Monica Sanchez said

      Hello Federico.
      From what you count, it looks like it has California Louse.
      It is treated with pyriproxyfen, following the indications specified on the product packaging.
      A greeting.

  4.   jhiro said

    Hello good morning, I have a lumonero, whose leaves are cracking and seems to dry out. Can you help me please

  5.   Max said

    Hello dear, can you tell me where I can get neem oil or derivative for pest control, where I can get it and its value, thank you

    1.    Monica Sanchez said

      Hi Max.
      You will find neem oil in nurseries, garden stores, and online stores.
      On ebay you are likely to find it too.
      If you don't get it, tell me and I'll help you.
      A greeting.

  6.   Inma said

    Hello. 3 years ago I bought a lemon tree. Soon all the leaves began to fall off. They told me in the nursery to treat it with someone insecticide. It almost died… a year later I decide to plant it in the ground. It seems to get worse, but in the end it gets Be filled with flowers by when the frosts begin to bear fruit and now it has no leaves and I observe that many branches have turned brown. Some start from the top but another is only brown in the center. What's wrong? He needs urgent help ...
    Thank you

    1.    Monica Sanchez said

      Hi Inma.
      Your tree looks like it has felt cold.
      My advice is that you remove all the dry part (brown), and add a layer of 2cm of organic compost (manure, worm castings, whatever you can get more easily). Thus, the roots will not only be kept at a comfortable temperature but also, now that the good weather is back, they will have more strength for the lemon tree to recover.
      A greeting.

      1.    Immaculate said

        Thanks Monica, I'll tell you how it ends

        1.    Monica Sanchez said

          Agree. 🙂

  7.   Marco said

    Hello, good morning, I have a lemon tree and its leaves seem to have a dark fat, and this spreads to the fruit, could you tell me what it is and how do I fight it?

    1.    Monica Sanchez said

      Hi Mark.
      From what you count, it looks like your tree is being attacked by the bold fungus. It is fought with copper.
      A greeting.

  8.   Gustavo said

    Hello Mónico, I wanted to ask you if it is convenient to treat the aphids of a young lemon tree, which still does not bear fruit, with a systemic acaricide insecticide (GlacoXan). Thanks a lot!!

    1.    Monica Sanchez said

      Hello Gustavo.
      Glacoxan acts by contact and ingestion, thus eliminating pests. Even if it is a fruit tree, as it still does not bear fruit, you can treat it without problems with it. Anyway, if you prefer an ecological remedy, you can choose to put yellow sticky traps that are sold in nurseries.
      A greeting.

  9.   Cristina said

    Hello, I have a lemon tree that the leaves are drying as if it lacked water and the lemons were small and mature, it is as if the plant was drying out, what can I do? Thank you

    1.    Monica Sanchez said

      Hello Cristina.
      How often do you water it? It is a fruit tree that needs a lot of water, every 2 days in flower and fruit season. It is also necessary that it is fertilized with organic fertilizers from spring to late summer so that it has all the nutrients that it will use to complete the development of leaves and fruits. As such you can use cow manure, pouring a 3-4cm layer around the trunk once a month.
      A greeting.

      1.    Sergio said

        Hello Monica. I have a lemon tree, 4 seasons and it is affected by whiteflies, and what you see in the photo (link at the end of the comment) is like fungus on the bark for me, but I am not sure what it is and how to combat it.
        Bordole broth (copper hydroxide and lime, in equal parts) is used to treat this disease and insects?
        PS: I'm from Argentina, and it's the beginning of autumn.


        1.    Monica Sanchez said

          Hello Sergio.
          Yes effectively. The Bordeaux mixture is useful for treating both fungi and insects, in this case the whitefly.
          You have to mix 10 grams of copper sulfate and 20 grams of calcium hydroxide in one liter of water.
          A greeting.

  10.   Cristina said

    Monica I water it every day and a lot and nothing and I stopped watering it and not because I thought it was excess water and fertilizer. I don't know what to do. Thank you for answering me. I'm desperate because it is a relatively young plant that my parents gave me and it is It does not have new shoots either, the olanta is 4 seasons, I am from Argentina, now we are in autumn but in the years that I have it, I never saw it like this

    1.    Monica Sanchez said

      Hello Cristina.
      The lemon tree needs water, but it is true that an excess of watering is very harmful.
      I recommend you water it less, twice a week. The leaves may continue to turn ugly for a while, but this is normal.
      Water it with homemade rooting hormones (here explains how to obtain them). This way the lemon tree will take out new roots, which will give it strength.
      A greeting.

      1.    Cristina said

        Thank you very much Monica. I will try watering it less and putting rooting hormones (lentils) on it. The only thing that says where to prepare it is for cuttings or new plants. 5 years? Thanks for your answers

        1.    Monica Sanchez said

          Hello Cristina.
          Yes, lentils are the same for all plants 🙂.
          Being natural, your lemon tree will do well.
          A greeting.

          1.    Cristina said

            Thank you very much and I'll tell you how it went !!!! Greetings!!!!

          2.    Monica Sanchez said

            Greetings to you.

  11.   Armando Rondón said

    Hello good day…!!!! I have a lemon tree that has already been planted in my backyard for almost 9 years, it has flowered and produced good fruit, but this last year it was attacked by aphids, cochineal and miner, I watered it with white oil (the same product that You point out but in Venezuela it is found as white oil), and I managed to control the pests a little, but for 5 days now I have been seeing on its sheets a film in the form of powder, sticky white, I could not explain better, could you give me An email and I send you some pictures so that you can help me determine what it is and to be able to attack it. Thanks

  12.   Armando Rondon said

    Hello, good morning, I have a lemon tree that has been planted in the backyard of my house for about 9 years, it has flowered and given good fruit until 1 year ago that suffered from cochineal, leaf miner and aphids all together, I applied white oil and improved but since About 5 days ago I have seen that a part of it in most of its leaves has a white film in the form of a whitish and sticky powder, if you send me an email I could send you some photographs so that you could help me please ... Thank you very much .

    1.    Monica Sanchez said

      Hi Armando.
      You may have the botrytis fungus.
      For fungi it is better to always use synthetic fungicides and not so much the natural ones, since they are microorganisms that act very quickly. That's why I recommend treating him to Aliette or Bayfidan.
      A greeting.

  13.   Astrid said

    Hello Monica, I have a lemon tree. Something strange appeared on its trunk and the tree that is dying already has a dry branch, it has a kind of long white granites.

    1.    Monica Sanchez said

      Hi Astrid.
      You can treat it with Fenitrotion or Deltamethrin, which are two insecticides that will eliminate the insects that are damaging the trunk.
      A greeting.

  14.   Veronica Muñoz said

    Hello, I have a very nice lemon tree and its leaves are full of something white and sticky, with what liquid can I disinfect it? stay tuned thanks

    1.    Monica Sanchez said

      Hello Veronica.
      From what you count, it looks like it has a cottony mealybug.
      Being a fruit tree, I recommend using paraffin oil, which is a natural insecticide. But if the pest is widespread, it is better to use synthetic insecticides against mealybug.
      A greeting.

  15.   Marcelo said

    I have a four season lemon tree that until last year was fantastic, but last time it gave many lemons but boys and lost the foliage, and now it is practically without leaves and with small lemons, what can I do for my lemon tree?
    THANK YOU slds Marcelo

    1.    Monica Sanchez said

      Hello, Marcelo.
      How often do you water it? The lemon tree is a tree that needs frequent watering, three to four times a week in summer, and twice a week the rest of the year. It is also necessary to fertilize it during the spring and summer with organic fertilizers, such as guano or manure.
      To help you improve, I recommend you water it with water with lentils (here explains how).
      A greeting.

  16.   Mara said

    Hello Monica. My lemon tree is bearing small fruit that the peel is breaking, but the fruit is healthy. What can be?

    1.    Monica Sanchez said

      Hi Mara.
      Sometimes it happens when you are running low on water and / or compost. During fruiting you need a lot of both for the fruits to develop well. Thus, it is highly recommended to pay it with a quick-effect fertilizer, such as guano in liquid form, following the instructions specified on the package.
      A greeting.

  17.   Viviana Nunez said

    Hello. I have a lemon tree. It has a kind of white eggs all over the trunk and twigs. They are hard, when we burst them it looks like a larva and comes out like honey from the egg. It is spreading very fast, and it is passing to another orange tree. That honey that comes out of the egg falls on the leaves. It is like slimy and many wasps and birds come to it. We have fumigated it with charcoal vinegar and rather it proliferates. We do not know what it could be and how to fight it. What can we do?

    1.    Monica Sanchez said

      Hi Viviana.
      I recommend treating it with Chlorpyrifos 48%. This will eliminate the pest.
      A greeting.

  18.   Ana Maria Barcelo Torrealba said

    Hi Monica, I have a lemon tree for 6 years in a 60 cm diameter pot, last year it bloomed and it had lemons the size of olives and brown in color and they ended up on the ground, it only saved me two lemons and this year I'm going for the same symptom. I would be very grateful if you could solve this problem for me, greetings.

  19.   Dionysus Trinidad Zamora said

    Hello Monica: I have several Persian lemon trees about 9 years old, since last year the size of the lemons as well as the production have been decreasing. I attribute it to a brownish (or ferrous) stain, which appears dusted, which has spread to all branches of the foliage. I have not been able to properly identify it and therefore I have not been able to treat it. Curiously, only the lemon trees have it and not the sweet orange trees that are planted around the land. Any advice will be greatly appreciated

    1.    Monica Sanchez said

      Hello Dionisio.
      Could I have California louse? The stains it leaves are like the color of rusty iron.
      A remedy that has been very effective is mineral oil, which you can make at home by mixing 10 liters of water, 200cl of sunflower oil and 20cl of homemade or potassium soap. You have to start by adding the same amount of water as oil, then add the rest of the water and finally the soap little by little.
      Afterwards, it is shaken well and it will be ready for use (in winter and repeat in spring).
      A greeting.

  20.   Extras said

    And that a lemon has green spots?

    1.    Monica Sanchez said

      Hi Liset.
      If the lemon has green spots, it most likely has fungus. It is best to remove it and treat the tree with a systemic fungicide.
      A greeting.

  21.   miguel angel torres rodriguez said

    Hi Monica, I have a lemon and it is growing yellow twigs I need to know if it is a plague or something else and what can I do

    1.    Monica Sanchez said

      Hello Miguel Angel.
      Most likely, you are lacking in nutrients. I would advise you to pay it with manure chicken (if fresh, let it dry for a week in the sun) for its quick effectiveness and high nutrient content; if you can't get it, the guano is also very good. Put a layer of no more than 5cm thick, mix a little with the soil and water.
      It should improve soon, but if it doesn't, write us again.
      A greeting.

  22.   Maria Teresa Mata Arroyo said

    Hello, I have a lemon tree that although it seems healthy, the lemons inside are like corked and without juice, I would like to know if it has a cure and how, thanks

  23.   Marian said

    I have a lemon tree that once the flowers set, the fruits turn completely black and fall off. What can it be?

    1.    Monica Sanchez said

      Hi Marian.
      It could be that you have had a watering mess, dry spells followed by heavy watering.
      If that's the case, try to water regularly. In summer 3-4 times a week, and the rest of the year 2 a week.
      Have you paid for it? In spring and summer it is important to pay it with organic fertilizers, such as guano for example.
      A greeting.

  24.   Monica Sanchez said

    Hello SELM.
    They might be aphids. You can treat them with neem oil, placing some chromatic trap blue next to the plant, or with these Home Remedies.
    A greeting.

    1.    Laura Ramirez said

      Sorry Mony, I did not know that the lemon tree was watered only twice a week at this time, I have a lemon tree that has not grown and is already quite old, which was watered a lot and if it gave me a lot of lemons and very large, but ill and stopped watering for a very long period and now they have come out as a kind of worms or very small larvae like 4mm and I don't know what it is, in fact I already started watering it but I put 4 daily tubs (19-liter buckets), I imagine that is not the case, and what I must do to make it grow, I await your answer, thank you very much.

      1.    Monica Sanchez said

        Hello Laura.
        I recommend treating it with Cypermethrin to eliminate worms, and water it less. Four 19l buckets a day is a lot, it is better to add one or a maximum of two every three to four days.
        A greeting.

  25.   Janice said

    I have a lemon tree that for months has been drying out in parts with a kind of soot and has many ants. What could it be and how can I fight it? Greetings

    1.    Monica Sanchez said

      Hi Janice.
      It may be that the aphids have attracted the ants, and these in turn to the fungi.
      My advice is that you treat it with Chlorpyrifos, to eliminate aphids and, incidentally, ants.
      If it does not improve, treat it after 7-10 days with systemic fungicide, which will eliminate the fungi.
      And if you still do not see improvement, write to us again and we will tell you what to do 🙂.
      A greeting.

  26.   gabriela said

    Hello ... I have a lemon tree that in a week seems as if it had dried up ... it has rained so there is no lack of water ... it is very strange ... the leaves have dried as if they had been hit with a flamethrower and the fruits too ... as if I would have dramatically dehydrated ... what can I do ???? Thank you

    1.    Monica Sanchez said

      Hello Gabriela.
      Has it rained for several days in a row? It could be that it has had excess moisture and that the roots are having a hard time because of it.
      I recommend watering it with homemade rooting hormones (here explains how to obtain them). This will help your root system to get stronger.
      A greeting.

  27.   country said

    helloaaa. I tell you my problem. I have a lemon tree called Buddha's hand, it lost all its leaves and the ends of the branches acquired a brown color, I applied iron to the irrigation and it has recovered the leaves. I also transplanted it into a pot and added quality soil. It has improved a lot but the branches continue to spread their brown color, that worries me, what to do? Thank you

    1.    Monica Sanchez said

      Hello Fali.
      I recommend treating it with a fungicide, to eliminate the fungi that are probably affecting it. Anyone will do, but one of the most effective is Fosetyl-Al. Follow the directions specified on the package, and wear rubber gloves to avoid problems.
      A greeting.

  28.   Jose Alfredo Ortega said

    Hello I have a problem with my lemon and it is that all its new shoots are starting to dry and the lemons leaves have brown-black spots I hope you can help me thanks


    Hello. I have a quite large 4-season lemon tree, it gave many fruits, I am taking it out as I need it but for some time it has started to lose its leaves and it has less and less. At the base almost against the ground I have noticed that it has some species of honey oozing, but that does a lot. That could be happening ?

    1.    Monica Sanchez said

      Hello Angel.
      From what you count, it seems that it must have an insect that is damaging the trunk and / or roots.
      I recommend treating it with pyrethrin. If it does not improve, write to us again and we will tell you.
      A greeting.

  30.   fer said

    Hi there! I have a 4 season lemon tree on a greenhouse balcony. Beyond the cottony mealybug that always appears and I try to avoid it, now it appears as a very small brown bug that leaves a spider web all over the leaves. I do not know what to do. In two weeks a whole new bud that was born green, I left it opaque and almost yellowish. What I can do? Thanks

    1.    Monica Sanchez said

      Hi Fer.
      If it has left cobwebs it is probably a mite (spider mite).
      You can eliminate them with any acaricide following the instructions specified on the package, or with home remedies that we recommend here.
      A greeting.

  31.   Ernesto said

    Good a year ago that I planted some lemon shoots and they have grown a lot, the bad thing is that the leaves of the seedlings sometimes get yellow dots and the leaf rolls inwards and I don't know why, could you help me? Even some leaves with yellow dots fall off. Greetings

    1.    Monica Sanchez said

      Hi Ernesto.
      It may have a plague. Maybe Red spider o trips.
      If you can, take a photo of the underside of an affected leaf, upload it to tinypic, imageshack or our telegram group, and I tell you.
      A greeting.

  32.   Silvia said

    Hi, I have a lemon. But lately the plague has fallen, they are little black animals, it has a lot and it has flies that I can do to get rid of it. Thanks

    1.    Monica Sanchez said

      Hello Silvia.
      If you can upload an image to tinypic, imageshack or our telegram group and I tell you. Or through our Facebook profile.
      Maybe they are aphids, but to tell you what treatment to give, I prefer to see an image 🙂
      A greeting.

  33.   Nelio Melendez said

    Hello, I tell you that I had a lemon tree and it dried little by little by arts from the bud to the trunk, months later I planted another one at a distance of 20 meters and it began to dry the same in parts, what should I do?
    Thank you I appreciate your help

    1.    Monica Sanchez said

      Hi Nelio.
      For now, you can treat it with a universal insecticide.
      By the way, how often do you water it? You don't have to water it a lot: 2-3 times a week in autumn-winter and 4-5 times / week the rest of the year.
      A greeting.

  34.   David said

    Hello, I have a lemon tree with a cottony mealybug. The leaves are turning yellow. I started treating him 15 days ago with a polyvalent insecticide concentrate (chlorpyrifos 48%). Twice once a week, it stays the same. Now with more rain. How many days do you have to follow the treatment? It's right? Thanks

    1.    Monica Sanchez said

      Hello david.
      When the pest is widespread, it is better to treat the plant three times a week, at least two.
      A greeting.

  35.   Gerardo said

    Hello, I have a lemon tree and a lime, both are filled with black dust that even invades an apple tree. The latter has cotton on its branches, what do I do?
    Any specific product?
    A year ago they recommended a dogo plagicide for the same problem and after throwing it in, the tree dried completely in eight days.

    1.    Monica Sanchez said

      Hello, Gerardo.
      Most likely you have botrytis or powdery mildew. You can eliminate it with fungicides, such as Fosetil-Al.
      A greeting.

  36.   Patricia said

    Hi Monica, I have a lemon tree about 9 months old that I germinated from an organic lemon. It is in a large pot and now that summer is ending, some white dots have appeared on some leaves and others have lost their bright green. I do not see bugs on the leaves and some have slightly yellow edges. Could you advise me? Thanks

    1.    Monica Sanchez said

      Hi Patricia.
      Those little white dots could be bites of Red spider. They are very small mites, about 0,5mm, red in color.
      You can remove them with neem oil.
      A greeting.

  37.   Delia Amparo Salazar said

    Hello, I have a Persian lemon tree, it gives me a lot of flower, but before it grows, lemon falls off and on the trunk it has some white spots only on the trunk and each time it goes to the branches

    1.    Monica Sanchez said

      Hi Delia.
      White spots can be fungal, which are treated with fungicides. But if you can upload some images of the tree to tinypic, imageshack or share it in our telegram group to see how it is.
      A greeting.

  38.   Lourdes lara said

    Hello, I have a lemon tree that has some yellow dots, they told me it was a virus but they do not look like the photos I have seen. They are very small and it causes the lemon to be falling leaves and drying those points are all over the tree, leaves and stems. What can I do to save the little tree?

    1.    Monica Sanchez said

      Hi Lourdes.
      I recommend you treat it against lemon tree lice, with potassium soap, which is a natural insecticide.
      A greeting.

  39.   Adriano Securus said

    Hello good morning, I am from Argentina, I have an excellent lemon plant loaded with fruits, everything is perfect, but I have noticed a very sticky caramel-colored rexin-like exudation at the base of the trunk, what could it be?

    1.    Monica Sanchez said

      Hi Adriano.
      Surely you have a boring insect that is harming you.
      You must spray the entire plant with one of these insecticides: Bifenthrin, Deltamethrin or Fenvalerate.
      A greeting.

  40.   Isabel said

    Hello, if you can help me, I have a potted lemon tree ago, and for three weeks I have seen that the leaves are as if they were drying and the lemons apart from not growing are soft, please help me. Thank you.

    1.    Monica Sanchez said

      Hello isbael.
      Has it been in the same pot for a long time -years-? Most likely, you are running low on compost. You can fertilize it with organic fertilizers in liquid form, such as guano, following the instructions specified on the package, from spring to late autumn.
      A greeting.

  41.   Valentina said

    Hello, I have a lemon tree that its trunk and branches are black, comk if it had burned but it did not burn and the parts where it is black are dying and breaking. I want to know what it is? Beforehand thank you very much

    1.    Monica Sanchez said

      Hello Valentina.
      It probably has fungus. How often do you water it? Although the lemon tree wants a lot of water, it is necessary to avoid that the soil remains damp every day. During the summer you need three or four weekly waterings, but the rest of the year two per week are enough.

      To try to save it, you must treat it with a copper-based fungicide. Dilute the dose in a watering can and moisten the soil. If the tree is young, I also recommend spraying everything with this same water: branches, leaves and trunk. Repeat the treatment after ten days.

      A greeting.

  42.   ruben acosta diaz said

    Good afternoon, I have two hectares of Persian lemon, and the fruit stains after cutting the next day they wake up with brown spots as if they were beaten. What can I do or is it some lemon disease ????

    1.    Monica Sanchez said

      Hi Ruben.
      The tree probably has fungus. I recommend treating it with copper-based fungicides, spraying leaves and trunk, and watering well to treat the roots as well.
      A greeting.

  43.   Fredy Gomez Liebano said

    Hello, I have a two-year-old lemon tree, about three months ago, the new leaves began to dry, preventing their growth. Atte Fredy Gomez

    1.    Monica Sanchez said

      Hi Fredy.
      Have you paid it? How often do you water it? And one more question, have you checked if it has any plagues? It could be that you lack food (compost), water, or that some parasite is harming you.
      A greeting.

  44.   Jose said

    Hello, I have a young lime, in the tender leaves, it appears like the trail of something that has traveled it, like a little path of some bug, between the beam and the underside. What can be?

    1.    Monica Sanchez said

      Hello Jose.
      It will probably be a larva. You can treat your tree with diatomaceous earth (The dose is 30 grams per liter of water). Spray all the leaves well on both sides, and the trunk. It will be white ... but it will recover 🙂.
      A greeting.

  45.   Rafael said

    I have a lemon tree lunero or 4 seasons. It grows a lot of lemons all year round.
    Now I notice that their leaves turn yellow and some lemons have something like a brown insect, elongated, like a grain of rice, hooked. Around him a halo of a lighter color, which lightens the color of the lemon. In other lemons I have seen white roe, all together.
    It has some cobwebs on some branches.
    I've put slow release iron on it and a thin top layer of manure.
    The tree is about 2,5 meters high and another 2 meters wide.
    Watering is weekly on the substrate and leaves.
    What can you recommend me?
    Thank you!

    1.    Monica Sanchez said

      Hello Rafael.
      Well, two things, but harmless to the tree 🙂:
      -Buy yellow colored sticky traps and place them near the tree. This will kill spiders and other parasites that may be hurting you.
      -Water it all (sheets included) with diatomaceous earth (The dose is 30 grams per liter of water). The tree already warned you that it will be white, but it will end up recovering.
      A greeting.

  46.   Bill said

    Hello, good morning, I have a lemon tree, I do not know how old it is, a few months ago I took out two air layers and I have them in a pot, apparently they are growing well, however I have noticed that one of them in the new leaves has something that They look like black insects formed in rows, they do not walk but they do make a movement, like pulses, and they do it all at the same time. I have also noticed that some blades have very fine oil and fluff. What can they be? If it is a plague, how can I treat it?

    1.    Monica Sanchez said

      Hi Guillermo.
      See if they are trips. The fluff was probably made by the Red spider. However, you can clean the leaves with a gauze moistened in water to remove parasites.
      A greeting.

  47.   Iron said

    Hello, my lemon tree has flies and I don't know what to do, there are small flies and the common black ones, will it have any disease? Thanks

    1.    Monica Sanchez said

      Hi Fer.
      I recommend acquiring yellow colored traps and placing them near your tree. Yellow is a color that attracts them a lot, and once they stick to the trap they will not cause any more problems.
      You can find them for sale in nurseries.
      A greeting.

  48.   martha roses said

    Hello, I have a lemon tree and it also has a plague, it is like black ash and white cochineal. My question is, can tobacco tea be used to combat them?

    1.    Monica Sanchez said

      Hi Martha.
      Yes, indeed, it could work.
      But diatomaceous earth it is very good insecticide. I see that you are from Mexico, you will surely find it for sale on the free market website. The dose is 30g for each liter of water.
      A greeting.

  49.   Leandro said

    I have the
    Backyard tree shedding some kind of sticky resin all over
    Sides, we feel it because when we go out to the patio
    And terrace the shoes stick when walking, we have reviewed and found some very small green insects that fly and on the leaves some very small white things

    1.    Monica Sanchez said

      Hi leandro.
      It may be that it has been watered excessively. I recommend treating it with a fungicide to eliminate and prevent fungi.
      A greeting.

  50.   Leonardo said

    My lemon tree is about 13 or 14 years old, it was good, sometimes whitefly or something less, but for less than a week it has been like a plant that does not receive any water, with the leaves all falling off and everything in question One week. It looks like a cut plant that is drying out or not receiving water

    1.    Monica Sanchez said

      Hello Leonardo.
      Have you checked if it has any pests on the leaves? Has there been any change in your crop (changes in the frequency of irrigation and / or fertilization)?
      In principle, I would recommend you pay it regularly with organic fertilizers. But it is also important to know if it has any pests, in which case it should be treated quickly with specific insecticides, or with diatomaceous earth (The dose is 30g for each liter of water).
      A greeting.

  51.   CECILIA said


    1.    Monica Sanchez said

      Hello cecilia.
      Yes, it may be gummies.
      You can treat it with fungicides that contain copper, following the instructions specified on the product packaging.
      A greeting.

  52.   normantin said

    My 4-season lemon tree has good leaves and this year it gave a lot of lemons but the trunk and branches are filling with fluff-free rounds, it looks like a damp stain and a branch wants to dry, it is old, it is more or less 25 or 26 years old but not I want to lose it, I have a kinoto that is 60 years old, planted when I was a girl and it gives many kinotos, it has the same in the trunk and branches that I can put them when they send the answer from already very grateful

    1.    Monica Sanchez said

      Hello normasantin.
      I recommend treating them with ecological fungicides, for fungi, such as potassium soap for example.
      A greeting.

  53.   gerardo bustamante said

    Hello Monica. I have a Yellow Lemon Tree and a Green Lemon that have no seed The Green Lemon was fine Nice but the leaves began to turn black and redden and they no longer grow Flowers and the other Yellow Lemon is very old and the disfigured lemons come out, could you tell me question can i ask? thank you

    1.    Monica Sanchez said

      Hello, Gerardo.
      Have you checked if they have any plagues? Rolled leaves can be a sign of trips o aphids.
      I also recommend paying them with Organic fertilizersand manure or guano. This way they will have more energy to produce lemons.
      A greeting.

  54.   jaqui said

    Hello. I am from Buenos Aires. In a matter of two weeks the leaves of my four season lemon tree got weird. It is a small tree, but I have taken more than 50 lemons per batch. This time, I should have had a lot of baby lemons by now and if there are 10 there are a lot. The leaves are lighter than usual, they are stained dark green behind, and rolled up and down the middle. When touched they feel dry and stiff, like hard. it has had plagues other summers, that I have cleaned them joja by leaf with soap, and more than that white fluff and the leaf wrinkled towards a characteristic side of that plague, it did not happen. This time it is different. I do not see cobwebs, no bugs behind the leaves or on the stem, or flying. No brown spots or anything. All the leaves are the same, there is no good. And that's why I think it could be something from the land or from irrigation. I hope I have provided you with the necessary information and have contributed to your diagnosis. Thanks a lot!!!

    1.    Monica Sanchez said

      Hi Jaqui.
      From what you count, it certainly appears that some nutrient is missing, probably boron.
      Therefore, I recommend you fertilize it with a foliar fertilizer rich in this nutrient. This way you will assimilate it more quickly and you will recover sooner. If you can't get it, you can use soil fertilizers, the kind that dissolve in water.
      A greeting.


    Hello. I am Osvaldo de Rosario. The trunk and branches of my lemon tree are infested with a kind of white nit. What remedy do you advise me? Thanks.-

    1.    Monica Sanchez said

      Hi Osvaldo.
      If the plant is not very tall you can remove them with cotton moistened with water and a little pharmacy alcohol.
      On the contrary, if it is big, I recommend more treating it with paraffin oil insecticides.
      A greeting.

  56.   Call us said

    Hi there! I wanted to make an inquiry, I have a lemon tree seedling and yellow spots are growing on the leaves. For what is this? And what can I deal with? Thanks!

    1.    Monica Sanchez said

      Hi Bel.
      It may be that a nutrient is missing. Fertilize it with a compost, if possible foliar, rich in nitrogen and iron.
      A greeting.

  57.   Ruth said

    Hello Monica .. I am from Argentina and I have some lemon trees that I plant are small, they will be 4 months or so. The subject that they stopped growing and when I saw them it has like aphids whiter than the stem and it also has ants ... How do I make them go away ... Porfí. Thanks a lot

    1.    Monica Sanchez said

      Hello Ruth.
      En this article many remedies against aphids and other insects are mentioned.
      A greeting.

  58.   Gabriel gareis said

    Hello, very good evening, my problem is that I have a lemon tree, which is practically drying entirely, I already have another lemon tree that died in this way. It begins to dry from the tips inwards, the few lemons they have do not grow. We have sprayed it for mushrooms, we also gave it iron, and we watered it well. We've had it for several years (on land) and we've never had this problem until a year ago. Anything I send you photos in some way.
    Thank you so much!

    1.    Monica Sanchez said

      Hello Gabriel.
      It could be that it had a virus or bacteria. Unfortunately there is no effective cure to treat it.
      What should be done is to disinfect the soil before planting another tree, for example using the method of solarization.
      Anyway, if you can, send photos to our Facebook profile to see.
      A greeting.

  59.   louis florez said

    Hello, how are you doing? I have a lemon and lately you see a brown stain that I put on it to cure it, thanks from Colombia

    1.    Monica Sanchez said

      Hi Luis.
      I might have Red spider. If so, it must be treated with acaricide.
      A greeting.

  60.   mary said

    How to combat the whitefly on my lemon tree, it is new, it does not reach two meters.

    1.    Monica Sanchez said

      Hello Mary.
      You can place sticky yellow traps - sold in nurseries - near the tree. This controls the whitefly population and keeps the tree safe.
      A greeting.

  61.   Gloria said

    Hello, I have a lemon tree whose leaves have turned a very light green almost white and it does not fail. What can be?

  62.   Mario said

    Hello, I have a 4 season lemon tree that has given me yellow lemons but lately (in summer) it only gives me green lemons and some are quite large but still do not turn yellow. What could be happening to him? Thanks a lot. The forum is very interesting.

    1.    Monica Sanchez said

      Hello Mario.
      If you have never fertilized it or very rarely, I recommend you add two or three handfuls of chicken manure (if it is fresh, let it dry a week in the sun beforehand), and mix it with the most superficial layer of the soil.
      This way you will have strength and will be able to finish your fruiting successfully.
      A greeting.

  63.   Iza said

    I have 17 lemons and an orange tree in my care. My father fell ill and the family home was left to me along with all the trees.
    15 of them are Persian lemons and two are Chinese lemons (I don't know if they are called the same in your country)
    The former are over 20 years old. And I have noticed that some branches have dried up and they turn black I am very concerned that it will be a plague and kill everyone. Another one, I think it lacks fertilizer.
    I don't know how long the life expectancy of a lemon is.
    So there would be three questions
    If it is a pest, what type of pest it is and if it has treatment.
    What fertilizers can I put on them.
    And how many years does a lemon live?
    The other two are healthy but I think I think they need a pruning.
    What is the season to prune them.
    The orange tree is throwing its leaves but I think that from what I read it would be because of the climate that has become very cold. I don't know how to remove it from the air because they are outdoor trees, not potted trees. Could it help to cover it at night?
    I was wrong I have more trees in my care.
    I have three orange trees that, as they are very far within the field, have never been pruned and as they are sour or whoever remembers them.
    The question would be when they can be pruned and how And could you remove the sour?
    I have another lemon, one without a seed, does it have the leaves, how would it be from the cold?
    That if it is too big to cover it. Or can it be a disease?
    Well, I think I no longer remember but if I remember more trees (the land is very large and some trees are very far from the house, so they go unnoticed) or sufferings of these I would like you to guide me.

    1.    Monica Sanchez said

      Hi Iza.
      I answer you in parts:
      1.- Do you know how old they are? I ask you because, more than 20. A lemon tree can live from 40 to 70 years, but it is normal that when its end approaches it begins to lose branches and produce fewer lemons. Therefore, depending on how old you are, it may be that what happens to you is that you are aging, or that the fungi are affecting your roots, in which case you should treat it with a fungicide.
      2.- With regard to fertilizers, you can fertilize them with organic fertilizers, such as guano, manure (chicken manure is highly recommended since it is very rich in nutrients, but if you can get it fresh, let it dry in the sun for a week or ten days). You put a 3-4cm thick layer around the trunk and then mix it with the top layer of the soil.
      3.- With regard to the pruning of the orange tree, it is done at the end of winter. You have to remove dry, diseased or weak branches, and you also have to clean the center of the crown a bit, that is, you have to remove or trim those branches that intersect or give the tree a tangled appearance. The taste cannot be changed.
      4.- With respect to the lemon tree with the leaves facing up, look to see if it has any pests, such as trips (they are like very small black earwigs) or aphids. In the event that you have nothing, it may be that you lack compost.

      A greeting from Spain.

  64.   María said

    Hello Monica, I have a lemon tree about 4 years ago, it is on the ground and a month ago I began to notice that the leaves have a yellowish green color, and at the same time as dull. On the wrong side, some leaves have as if they were traces of earth, like little black dots that come out when touched.
    Which may be? How can I cure it with a homemade product? I usually water it 3 times a week.
    Thank you!

    1.    Monica Sanchez said

      Hello Maria.
      From what you count, it looks like he has thrips. They are like small black earwigs.
      You have more information about them here.
      A greeting.

  65.   Carlos said

    Hello Monica.
    At a friend's house, a 7 or 8-year-old lemon tree dried up in two or three days at once. The leaves were crisp white and the lemons two or three centimeters in diameter brown. It produced very well. I don't know what happened to him. Can you help me?

    1.    Monica Sanchez said

      Hi carlos.
      Where are you from? You may have had some virus u mushrooms.
      In any case, before planting another it would be highly recommended to disinfect the soil, for example by solarization.
      A greeting.

  66.   Francisco said

    Hello, good morning, I have a lemon tree and it has been a couple of months since the fruits that the tree produces have a light brown color on the peel and not the green color, which may be happening with the fruits that have this color.

    1.    Monica Sanchez said

      Hello Francisco.
      It may be that you need more nutrients. Have you ever paid it? If you haven't, I recommend using guano for its nutritional richness and its rapid effectiveness.
      A greeting.

  67.   Juan Daniel said

    Greetings Monica, I would like to know how I can control the moss in the lemon crop and what molecule could I use for its subsequent control and prevention?

    1.    Monica Sanchez said

      Hello Juan Daniel.
      To control moss, it is enough to not water more than necessary. This prevents it from growing.
      However, as it has very, very short roots, they can be removed by hand.
      A greeting.

  68.   Francisco Ivan Farina Rivera said

    I have about three Creole acid lemon trees but they have been affected by two diseases, one is that it has vertical armor on the stem up to 20cm long and 2 centimeters deep and one cm wide and the stem is about 10cm in diameter, a young tree I am 5 years old and I am located in Managua Nicaragua in a large savanna climate between 22 degrees and 34 degrees and the other disease is that a white layer is placed on the bark of the tree that covers the entire bark and the affected part loses its leaves and dry seems honeyed

    1.    Monica Sanchez said

      Hello Francisco.
      I recommend treating the first one with an anti-drill insecticide, which is what I suspect you have; and the second with a copper-based fungicide to eliminate fungi.
      A greeting.

  69.   Maria artime said

    Hi Monica, I have a Persian lemon tree planted in a pot, it has given me many lemons, large and juicy, but now there are some yellow spots on the leaves, half circular, some have a light brown spot in the center that looks like dry, surrounded by a yellow color, I don't know what it will be, I would appreciate it if you would advise me when I have a chance, I live in Florida, where the climate is hot and humid.
    Thanks for your consents. Regards,

    1.    Monica Sanchez said

      Hello Maria.
      From what you count, it could be that he had leprosis. You have more information here.
      A greeting.

  70.   Rai said

    Hello, I have a lemon tree, already tree-like, about 2,5 meters high, with a large amount of fruits, and for two months the fruits have started to rot on the tree, they appear with some spots on the outside that spreads throughout the fruit and ends up being lost. To coincide with a period of very heavy and continuous rains. I am in Galicia. It is some kind of plague or disease.
    All the best

    1.    Monica Sanchez said

      Hi Rai.
      No, not really sick. Excess water yes.
      In order for lemons - and any other fruit - to ripen well, it needs to receive regular waterings. Obviously, you can't control the rain.
      My advice then is that you do not water -or water the minimum- during the months that in your area it usually rains very frequently.
      A greeting.

  71.   Marivi said

    Hello Monica, I have a lemon tree planted in my garden for 9-10 years, it gives good lemons but since the summer the leaves began to turn very yellow and they fall a lot, I thought it would be a lack of iron, we added a product To prevent this deficiency, but it remains the same, the leaves do not turn green, we have also observed that the trunk has lighter spots, they do not look like roe, or insects.
    What do you think it could be? What I can do?
    I could send you pictures if you give me an email, thank you. Greetings

    1.    Monica Sanchez said

      Hi Marivi.
      It may be a lack of manganese, which causes symptoms very similar to iron chlorosis.
      The light stains on the trunk may be due to the lack of this mineral. Anyway, you can send us photos through our Facebook.
      A greeting.

  72.   Jesus Balcorta said

    hello my name is Jesus I have a lemon tree on the ground, last year the cold started to burn it released all the leaves but it already came out again. it bloomed but the flowers dried up. I put chicken manure on it and when I water it they arise from the I soil some 1cm white worms. I do not know if the manure was not very dry and I would like to know if they affect it. and know why the flowers dry. Please tell me what to do 'Thank you God bless you

    1.    Monica Sanchez said

      Hello Jesus.
      It may be that they come out of the manure as you comment. At first I don't think they affect the tree, but you can add cypermethrin to prevent problems.
      The flowers wither when they have been pollinated, or when time passes and no insects pollinate them. It's a normal reaction 🙂.
      A greeting.

  73.   Augustine Tiblanc said

    With respectful greetings I am an Augustinian engineer, I work in onion but now they call me now to work in lemons although I do not have a greater knowledge of lemons, how can Mr. Monica help me so that I do not feel ashamed.

  74.   Florence Parra said

    Hello, looking for advice for my citrus fruits, I came to this page, I am from Chile, we are in the middle of autumn, today reviewing the citrus fruits I found some orange, lemons and grapefruit that have some yellow leaves and wrinkled at the tips ... it has me worried, and two mandarins they have many black leaves !!
    Would you advise me what to do please?
    and if you could recommend me some fertilizer
    thank you!

    1.    Monica Sanchez said

      Hello Florenciana.
      Have you looked if it has trips? They are like earwigs but much smaller, black in color. In the link you have information on how to combat them.

      In the event that they are not, send us a photo to our Facebook profile.

      A greeting.


    Good morning, I have a lemon tree (tree) in the backyard of my house that is about 6-7 years old, I am very worried because it does not shed leaves and the ones that are left are falling off and are yellow. However, it has thrown a lot of flower, but I see that as the days go by it also loses it and throws away the little lemons. Notice that it also has the miner on some leaves from last year. It is 2 meters high and it does not have a single new leaf. Please give me an answer. Thank you very much in advance.

    1.    Monica Sanchez said

      Hello Manuel.
      I recommend treating it with an anti-miner insecticide. You will find it for sale in nurseries.
      Spray the entire glass well, at dusk when the sun is already going down.

      I also recommend paying it. Fertilizers such as chicken manure (in Amazon they sell 25kg bags for 9 euros), or with guano, will give it strength. You put a few handfuls around the trunk and up to a distance of about 40cm from it.

      A greeting.

  76.   nerea said

    Hello Monica, I have a young lemon tree planted in a pot, a small cut has come out in the lower part of the trunk, some leaves also have brown spots and others seem bitten by insects, what can I do to heal the tree thanks.

    1.    Monica Sanchez said

      Hi Nerea.
      I recommend treating it with a broad spectrum insecticide, spraying leaves and trunk. Try to also take inside the cut.
      A greeting.

  77.   Agustina said

    Hello, my lemon tree gives few lemons, sometimes it gives 1, other 2,3,4, but not more than that, and it is quite tall, it must measure more than two meters. I also notice that they take a long time to mature and even though they are yellow, the peel is very hard. Are you missing a nutrient? Thanks!!!

    ps: I just watched him and I found many insects under some leaves, so I am going to try the remedy mentioned above for any doubt that is.

    1.    Monica Sanchez said

      Hello Augustine.
      Yes, if you have a plague, you have to treat the plague 🙂
      But hey, a contribution of ecological compost.
      A greeting.

  78.   Carlos said

    Hello Monica. I have a lemon tree that yields a lot of lemons, but now small black spots have appeared on the fruits that can be detached with the hands or by rubbing them. What plague is it and how is it solved? From already thank you very much

    1.    Monica Sanchez said

      I recommend treating them with a copper-based fungicide. They are probably mushrooms.
      A greeting.

  79.   Joseph Corrales said


    I have a lemon tree at home that this year something very strange is happening to it, the lemons rot on the back of the lemon and also apart from that the lemons fall off on their own before their time; that is to say, it does not reach its maximum size, because every day I find a lot of lemons thrown on the ground. These lemons that I mostly find on the ground fall off on their own and are also in good condition.

    I would like to attach photos, but I don't know if that is possible.
    Thank you very much

    1.    Monica Sanchez said

      Hello Jose.
      How often do you water the tree? Have you paid for it?
      For the lemons to reach term it is important that the plant is not thirsty at any time, and that it receives regular contributions from Organic fertilizers from early spring to late summer.
      A greeting.

  80.   Johana said

    Hello, I have five small lemon plants transplanted into pots (I germinated them from the seed), at the beginning they were very beautiful green, but a few days ago I was reviewing them and I realized several things
    - Two plants in their lower leaves have yellow tips (new leaves are not like this)
    - Another plant has a huge gray-white spot (65% of the leaf) in the center (the lines are not noticeable
    centrals of the leaf or those that come out of it)
    Of the first two I was investigating and I do not know if it is a deficiency of some nutrient or something, but of the other if I am totally lost (I do not know if I know a fungus, red spider, nutrient deficiency, etc.)

    1.    Monica Sanchez said

      Hi Johana.
      They are probably mushrooms. Trees that young are very vulnerable to damping-off. It is fought with fungicides.

  81.   Event said

    I have planted a lemon tree, it is about 25 cm tall. On the stems it has a white fluff (as if it were hair) I would like to know if this is normal). I am treating him with an insecticide compo on a daily basis because it has a miner.

    1.    Monica Sanchez said

      Hi Acara.
      In principle no, it is not normal. Have you looked to remove it?
      I would recommend treating it with a fungicide.
      A greeting.

  82.   Federico said

    Hello Johana, let me tell you that I have a lemon tree that is beautiful, but I have found several little white spiders, I understand that the red ones are the problematic ones, and they have eaten several bees, I see them dead on top of them.

    Is it necessary to spray with some oil to eliminate these aralñitas?

    thank you very much!

  83.   Jesus Domingo said

    Hello. I have two lemon trees transplanted to the ground for 3 months.
    They are 1 meters. height approx.
    One of them has developed white 4 or 5-millimeter bladders on the branches that, when bursting with the hand, a reddish liquid appears.
    How can I treat it? Is there a natural remedy?

    1.    Monica Sanchez said

      Hello Jesus.
      Could it be that they are cottony mealybugs? From what you count it is what I think your tree has.
      It can be treated with natural oils, such as paraffin or neem oil. If you are low on, they can be removed with a brush soaked in pharmacy rubbing alcohol.
      A greeting.

  84.   Carlos said

    Hi Monica, good morning. I need your help please; I have a lemon stick and it has been 3 years without fruit ???????????????????.
    I have given him fertilizers in many ways and nothing and I miss everything that the stores where they sell fertilizers say ???????

    In addition also all the sheets are stained wrinkled as samples in the first image;
    The question is, what can I do for the lemon stick to produce its fruits and scurate the leaves from the plague that it has ?????????

    1.    Monica Sanchez said

      Hi carlos.
      Your lemon tree does not need fertilizers now 🙂
      Treat it with insecticides, such as neem oil o diatomaceous earth (they sell them in amazon), or with an anti-miner that they sell in any nursery.
      A greeting.

  85.   Lemon tree said

    I have a lemon plant with insect burns, I would like to know what it can be and how to combat it.

    1.    Monica Sanchez said

      Hello Limonera.
      Without seeing a photo I can't tell you, since there are many insects, fungi, etc. that cause damage to plants.
      For now, if the plant allows it, you can clean the leaves with water and a few drops of pharmacy alcohol.
      But if you can, send a photo to our Facebook and I tell you better.
      A greeting.

  86.   Juan Uroza Hernandez said

    Good morning friend, my lemon tree has a trunk and branches like white ash spread on the bark, the foliage looks normal, however a branch of it has dried and I have done the pruning, but if I would like to contain that disease but I do not know what it is and how to remedy it. Urge your help please, and thank you in advance.

    1.    Monica Sanchez said

      Hi John.
      Well I'm a girl 🙂
      Your lemon tree may have fungi, which are treated with fungicides.
      Could you send me a picture at Facebook? So I can help you better.
      A greeting.

  87.   Alexander Camacaro said

    hello I have a lemon tree that blooms and when the lemons come out they fall off and also in different branches I have noticed that it has like a pigmented white snow

    1.    Monica Sanchez said

      Hello Alexander.
      I might have mealybugs. They are eliminated with diatomaceous earth that you can get in amazon for example. The dose is 35g of product per liter of water.

      Anyway, do you pay it every so often? If not, I advise you to pay it once a month with homemade and organic fertilizers, like the ones we say in this link.

      A greeting.

  88.   Juan BC said

    I have a lemon tree from many years ago and it gives good lemons, and a few years ago it was filled with small lemons, which we turned into lemon juice and frozen it. My neighbor's tree was the same. This year or since the previous year It started giving large yellow lemons and it continues to give them and I also see that it has been filled with small lemons, the same as the previous time, but with large lemons. Would you be kind enough to tell me what I should do, so that I don't produce small lemons?

    1.    Monica Sanchez said

      Hi John.
      Have you paid for it? How often do you water it?

      For all lemons to be more or less the same size, the tree needs a constant supply of water, as well as a supply of organic fertilizer (click to find out what they are) every 15 to 20 days. When it is watered a lot a few months and then a little in the following months, for example, lemons lose quality.

      A greeting.

  89.   Nelida Leiva said

    Hello, I have a lemon tree of the 4 seasons and it is affected in its leaves by the miner and also in some leaves it looks like cotton, it is full of green lemons and I do not know if to spray it for lemons, but in truth the tree is very ugly with its leaves all twisted especially those that are born new.
    what do I have to do, I would appreciate your guidance, because I really like this lemon tree

    1.    Monica Sanchez said

      Hi Nelida.
      From what you count, it looks like it has mealybugs. As the lemon tree is a fruit tree, rather than using pesticides, I would recommend using organic products that will not harm it (or harm you), such as potassium soap or the diatomaceous earth.
      A greeting.

  90.   Alberto said

    Hello, my lemon tree has small white butterflies and the leaves shrink without losing color, with which I spray them.

    1.    Monica Sanchez said

      Hello Alberto.

      Maybe more than butterflies they are mosquitoes iendo I recommend you buy adhesive yellow traps, which they sell in any nursery. Just hang them from some branches and wait. The insects will be attracted to the trap, and will eventually die.

      Another option, if the size of the tree allows it, is to pour water over it, and then sprinkle it diatomaceous earth, which is a fine powder composed of microscopic algae that contain silica. When it comes into contact with an insect, it pierces it and causes it to become dehydrated. And the best thing is that it is natural.

      If you need more information, click.

      A greeting.

  91.   Maria Gabriela Tallone said

    Hi Monica: I have had a potted lemon tree for 2 years. He grew up very well. I fertilize it with soil that I prepare with worms that I have apart and I give them vegetable remains. It produced a lot of fruits. But the lemons, still green, are some of them covering themselves with a very thin layer between light gray and whitish, completely glued to the peel, especially in the parts that are not exposed to the sun. Can something be done? The leaves are losing strength, but I put it down to having a lot of fruit. Thanks a lot

    1.    Monica Sanchez said

      Hello Maria.
      From what you say, your tree has a fungus, mildew.
      You can treat it with organic fungicides in spray, which are sold in nurseries.

      And if you want, join our facebook group : )


  92.   China said

    Hello, I have an adult lemon tree but branches are drying, this is alarming or it is moving, it worries me, it is 20 years old.

    1.    Monica Sanchez said

      Hello China.
      Where are you from? I ask you because if you are from Latin America there is a devastating virus, it is the sadness virus that affects lemon, orange, mandarin trees, in short, citrus. You have information in the link.

      Anyway, have you checked to see if it has any pests on the leaves? The mealybugs tend to affect lemon trees a lot, as well as aphids.

      You already tell us.


  93.   Lucinio Gallego Navarro said

    Hello, good morning, I would like you to advise me, I can spread ashes from the fire around a lemon tree, thank you very much, a cordial greeting to all.

    1.    Monica Sanchez said

      Hi Lucinio.
      Yeah sure. But only if it is already at room temperature; In other words, if it is still hot, no, because the roots that are just below the surface of the soil could be damaged.

  94.   vanine said

    Hello, good afternoon. I am from Argentina, a few months ago I moved to a house where there is a lemon tree, I don't know how old it is. It is full of lemons that will have come out a month or a little more ago, but they stopped growing and do not change color, they are green as they have just grown and some that were being born began to dry ... what could it be? I can do something? Thanks a lot

    1.    Monica Sanchez said

      Hi Vanina.
      Could it be that instead of lemon it is lime? The taste is similar, but the size is somewhat smaller. I leave you the link of an article in which we talk about the differences between both fruit trees in case it can help you, click here.

      If it finally turns out that it is a lemon tree, then I recommend fertilizing it, since it could be that it lacked nutrients.


  95.   ALBERTO said


    1.    Monica Sanchez said

      Hello Alberto.

      If you can get diatomaceous earth powder and sprinkle it on the leaves and on the ground. In case you can't, make an infusion with garlic and water and spray / spray the leaves with the resulting liquid.


  96.   Jose Jorge Latorre said

    To my lemon tree they appear as red spots stuck on leaves and trunk as if it were a limpet. They are removed by rubbing it. What can be? How would it be treated?
    All the best

    1.    Monica Sanchez said

      Hello José Jorge.

      They are mealybugs. You can eliminate them with an anti-cochineal insecticide. But if the tree is not very big, you can remove them with a brush soaked in water and a little pharmacy alcohol.


  97.   Ruben Barrero said

    Good afternoon, I have two potted lemon trees, last year one of them lost all its leaves, the other kept all its leaves in winter, both give flowers but they end up drying and do not bear fruit. This year in January I have pruned both and in March I have put compo brand citrus compost. In April the lemon tree that lost all the leaves has sprouted and is full of leaves and two buds. The other lemon tree is the one that worries me because it is full of buds, I suppose that in both cases it is due to the fertilizer, but in 3 days it is losing all its leaves, in addition the leaves that were being born seem to be without strength. I have looked in your disease guide but I don't see any signs. The only thing I have seen in the one that has lost its leaves are white threads like in your photo of mealybugs but I have not seen mealybugs or marks on the leaves. However, in case they were mealybugs, I have applied to all the plants on the terrace the solution proposed by you, alcohol and water in equal parts with a teaspoon of soap. I would also like to attach the photos of the lemon tree. I have the two lemon trees on a terrace in Madrid. Thank you very much for your help.

  98.   pepe t said

    I have a potted lemon tree that has lost a lot of leaves. Parts of the leaves dry and blacken and fall off. In addition, the branches are drying from the tips towards the trunk. What could it be due to? What should I do? Should I prune it by cutting off pieces of branches that have dried up?

    1.    Monica Sanchez said

      Hello Pepe.

      If you say it is blackening then it may be bold. Bold usually appears during a mealybug infestation, usually cottony. Therefore, I recommend you look closely at the leaves, on both sides, and treat the tree with a triple action insecticide like this one that they sell. here.


  99.   Adela said

    Hello, good morning… ..sorry for the inconvenience my lemon tree has the leaves with light green spots and I put soapy water with a little sunflower oil and an insecticide for the white fly, red spider and a lot of other pests… ..but its The leaves are still bad now it is with flower buds just beginning to emerge and I am afraid that it happens as in the previous harvest that the small lemons fell, only 16 lemons were harvested in a tree that has produced between 70 and 80 copies. How to do it? It has organic compost on the ground. It is in a garden and measures about 3 to 4 meters. It was pruned out of flowering in the months of June. I live in Argentina, here this month is winter… .. many leaves have fallen, what can I do?

    1.    Monica Sanchez said

      Hi Adela.

      How often do you apply the insecticide? I ask you why it is so bad not to use it (when necessary), as to use it more times or for longer than it would be appropriate. The container label should indicate how often it is to be used, and how.

      Anyway, having flowers is a good sign. My advice is that you stop using the insecticide, if it does not have any pests, and that you fertilize it with some type of organic fertilizer. For example, chicken manure can come in handy (but yes, if you get it fresh you have to let it dry for a week or ten days, as it is very concentrated and could burn the roots).

      Also, from time to time, once every 15 days or so, it would not hurt to water it with water and iron chelate. In this way, the leaves would be prevented from turning yellow.

      If you have questions, contact us.


  100.   Hydrangea Murillo said

    Hello, I have a very small lemon tree, for a few weeks it has like dark buds along the trunk, some bug lodged inside one of the tender leaves, I fold it in two and something like a small cobweb comes out of one end. Today I saw that a second tender leaf is the same, folded on itself and one like a cobweb coming out of one end. The first leaf is no longer bent, but the insect that was it ate half of the leaf. What plague can it be? And how to take it off? Please help, regards. Ah, some leaves have been partially eaten.

    1.    Monica Sanchez said

      Hello Hydrangea.

      From what you count it looks like it has a spider mite. It is a very common mite that affects plants (the vast majority). In this article we talked about how it can be removed.


  101.   José said

    Hello, I have a problem, my lemon tree does not bear fruit, it is sick and I would like to know how I treat it, its leaves have small light spots (many) that I do

  102.   Alida Rosa Suarez Arocha said

    Good afternoon Monica, I am Cuban and I live in Cuba. I have a lemon tree, which I myself plant from a seed, I have it on my terrace in a large pot. I beg it with plenty of water every day (I don't know if that's good or bad). Every day I check my plants and this morning I discovered that some mushrooms were growing on the ground. I don't know if they are beneficial or harmful to my plant, or if they are poisonous.
    I could send you a photo if you give me an email address. I would also appreciate any advice you can give me for my lemon tree
    Thank you very much, I will wait for your reply. Sincerely, Alida

    1.    Monica Sanchez said

      Hi Alida.

      The mushrooms have probably come out due to excess moisture. It is not good to water the lemon tree every day, unless the temperature rises above 30ºC in your area and there is no rain. Here You have the file of the tree in which we also talk about its care.

      You can send us some photos of the mushrooms through our Facebook.


  103.   Carlos Castro Laxalde placeholder image said

    What can be like a sticky glitter on the leaves of a very small, healthy, developing lemon tree growing day by day?

    1.    Monica Sanchez said

      Hi carlos.

      Perhaps it is sap from the plant itself, but if it has come out it is because it may have a plague. Have you checked to see if it had mealybugs? They are quite common in lemon trees.


  104.   pablo brañuelas serrano said

    The withered leaves are setting and they are hanging down, none have fallen ... they are green

    1.    Monica Sanchez said

      Hi, Pablo.

      Have you checked if it has any plagues? How often do you water it?
      I need to know this in order to help you as there are many possible causes.
      If you want, send us some photos to our Facebook.


  105.   Daniel said

    Good evening, I am writing from Buenos Aires, Argentina, I tell you, I have a lemon tree that has (from the photos I saw), lemon tree aphid, I am spraying it every other day with a solution of neem oil with potassium soap and water without chlorine. I do not see great progress, it will be because the sick leaves are on the tree. The doubt I have is, do I have to remove those diseased leaves that I mention?
    Thank you in advance

    1.    Monica Sanchez said

      Hello Daniel.
      Sometimes you have to carry out treatments for a long period of time so that the aphids go away. I recommend you to be patient 🙂
      The leaves that are bad, if they are still green, you should not remove them since they serve the tree.

  106.   Alex Garcia said

    tablespoon of what?
    Then add a small (coffee) spoonful of dishwasher.

    1.    Monica Sanchez said

      Hi Alex.
      There are many types of small spoons hehe, that's why in parentheses I specified which one should be used (the ones used when drinking coffee), so there would be no confusion.
      A greeting.