Powdery isikhutha imayelana isifo esivele ngenxa yefungus ebizwa nge-Uncinula necator Burr, okuthi, yize ivela eNyakatho Melika, isakazeke kakhulu kulo lonke elaseSpain.
Njengazo zonke isikhunta, uma imvelo nesimo sezulu zikulungele ukuthi zikhule, zingaba khona ezinhlotsheni ezithile ezithintekayoNgisho nokulahleka okuphelele kwesivuno ukuthi ngokungafani nesikhunta, isikhutha se-powdery sidinga amazinga okushisa aphezulu, indawo eyomile engenawo umswakama noma ubusuku obupholile.
Silondolozwa kanjani isikhutha esiyimpuphu esivinini?
Isikhunta esiyimpuphu ingagcinwa ngezindlela ezi-2, okuyilezi:
En isimo se-mycelium ngaphakathi kwamahlumela.
En isimo se-perithecas, njengezitho eziphikisayo naphezu kobuso bamahlumela.
Ngesikhathi sentwasahlobo, ukhunta ungena emagatsheni amahlumela angcolile. Imicu ye-mycelial ikhula ezithweni eziluhlaza, ezingcolisa nge-haustoria. Uma isimo semvelo sivumelana, i-mycelium ikhipha i-conidia, ezikhula ngaphezu kwezitho ezinempilo futhi zitholakala eduze kwalezo zitho ezingcolile, ezibangela ukuthi ziqhume futhi zivumele ukuthi isifo sisabalale.
Ziyini izimpawu nomonakalo odalwe yiPowdery Mildew?
Ukhunta odala isikhutha se-powdery, kuthinta isitho ngasinye somvini esiluhlazaKodwa-ke, kuvame ukuthinta amahlumela, amagatsha namaqoqo.
I-Los izimpawu nomonakalo okudala ukuthi isikhutha esimpuphu yilezi:
Emashidini
Kungenzeka ukubona indlela ye- impuphu yomlotha emhlane nasengxenyeni engenhla yeqabunga, engagcina isimboze ngokuphelele futhi ngaphansi kothuli ungabona amanye amabala we-necrotic. Kwezinye izimo, ekuqaleni kokuhlaselwa abanye amabala amancane ezibukeka njengamafutha esigxotsheni, zihambisana nezinye izindawo ezimnyama.
Uma kukhulunywa ngokuhlaselwa okunamandla, amaqabunga avela enesivumelwano noma agobile futhi embozwe ngokuphelele ngothuli kugongolo nangemuva kwazo.
Kumahlumela namahlumela
Izimpawu zesikhunta se-powdery zivame ukuvela njenge- amabala amancane angenalutho we-green hue mnyama, enyuka ngosayizi bese iba nsundu njengoba uhlaza luqhakaza bese luthatha umbala omnyama lapho ihlumela lignify.
Ngamaqoqo
Ekuqaleni kwesifo izinhlamvu vula umbala wokuhola futhi ngemuva kwesikhashana, zimbozwa ngokuphelele ngothuli olumpunga olwakhiwa izitho zokuphindaphindwa kokhunta, okwaziwa ngokuthi yi-comidia, ngezansi okuvame ukuba ezinye izicubu ze-necrotic zomthunzi omnyama.
Umonakalo obaluleke kakhulu obangelwa i-powdery isikhutha ngokuvamile utholakala ezihlangwini, ngoba ukuhlaselwa okunamandla kubangela ukuthi ukukhula kwesikhumba kuyeke futhi ngenxa yalokho isikhumba nezithelo zomvini ziyaqhekeka.
Izindlela zokuqeda isikhutha se-powdery
Kuyadingeka ukusebenzisa i- ukuthena ngokuluhlaza ukuze kwandiswe i-aeration, ngoba ngale ndlela kungenzeka ukuthi wakhe isimo esingesihle sokuthuthukiswa kwesikhunta futhi, kuvunyelwe lokho isikhunta singena emhlabathini, okuwukuphela kwendlela engenzeka yokuqeda ukhunta odala isikhutha se-powdery.
Ngokufanayo kunenani elikhulu lemikhiqizo namasu wokulawula ezisiza kakhulu uma kukhulunywa ngokuqeda isikhutha se-powdery usebenzisa imikhiqizo yamakhemikhali futhi omunye wemikhiqizo esetshenziswa kakhulu kuleli cala isibabule esiyimpuphu, okuthi uma ibekwe ngendlela efanele nangesikhathi esifanele, iphumelele impela ekuqedeni ukhunta.
Indlela engcono yokukwenza sisebenzise ngesikhathi sentwasahlobo lapho izinga lokushisa lingaphezu kuka-18ºC futhi ngesikhathi sasehlobo lapho lingadluli ku-35ºC.