I-Gray leaf spot nayo ibizwa ngokuthi i-sesame leaf spot ngabalimi bemifino ekukhiqizeni.Ilimaza kakhulu amaqabunga, futhi ezimweni ezimbi kakhulu, ama-petioles nawo awonakele.Esigabeni sokuqala sesifo, amaqabunga ambozwe ngamachashazi amancane akhanyayo.Izilonda zicwiliswe ngamanzi futhi azivamile.Ingxenye emaphakathi yezilonda inombala ompunga-nsundu ukuya kophuzi ngokunsundu.Imiphetho yezilonda kukhona ama-halos ansundu ngokuphuzi.Izilonda zicwile futhi 2 kuya ku-5 mm ububanzi., izilonda zivame ukubhobozwa ezigabeni zakamuva.

【Izimpawu Ezingavamile】 Izilonda zingamabala ayindilinga abomvu ngokunsundu.Esigabeni sokuqala sokuthoma, amaqabunga abonisa amachashaza ayindilinga amancane anombala onsundu ngokubomvu.Isikhungo sesilonda simpunga ngokukhanyayo, kanti i-halo ensundu ivela eceleni.Izilonda zikhudlwana kunebala elimpunga futhi umbala ugqamile.Ngemva kokunwetshwa, izilonda ziba amachashaza ayindilinga ansundu ahlangene futhi amaqabunga aphenduka aphuzi.Ukuvimbela nokwelashwa kwamachashaza ansundu kuyefana nalawo amaqabunga.

【Imbangela yesifo】I-pathogen idlula ubusika emasimini njenge-mycelium nezifo ezihlala zikhona.Izinhlamvu zamangqamuzana zisakazwa ukugeleza komoya, amanzi okunisela, nokuchaphaza kwemvula, futhi zingena nge-stomata.Isimo sezulu esifudumele, esinomswakama, elinemvula, ukutshala okuminyene, kanye nezindawo ezinomoya zivame ukungenwa yilesi sifo.Izikhukhula, umswakama ophezulu, ukuzala okunganele, ukukhula okubuthakathaka kwezitshalo kanye nezifo ezimbi kakhulu.Ngokuvamile, ukutshala ezindaweni ezivikelwe entwasahlobo kunezehlakalo eziphezulu zezifo kunasekwindla, futhi isivinini sobhubhane siyashesha.Ngenxa yesivuno esikhulu sezisekelo zokutshala izithelo eziqinile, inani elanele likamanyolo wezinto eziphilayo kanye nomanyolo oyinhlanganisela kudingeka kutshalwe.Ngokuphambene nalokho, ukulahlekelwa okubangelwa ubhadane lwezifo ngenxa yokuzala nokuphathwa okubanzi akunakugwenywa., kufanele kunakwe kakhulu futhi kuvinjwe kusenesikhathi.

【Indlela yokutakula】
Ukulawulwa kwemvelo: Ukutshala okuminyene okunengqondo.Ukuminyana kwezinhlobo ezethulwe ngokuvamile kuncane kunezinhlobo zasekhaya, kodwa isivuno siphezulu.Faka ngokufanelekile umanyolo webhayoloji kanye nomanyolo we-phosphorus ne-potassium, uqinise ukuphathwa kwensimu, unciphise umswakama, futhi uthuthukise ukungena komoya kanye nokudluliswa kokukhanya.Ngemuva kokuthola izimpahla, susa ngokushesha izinsalela ezigulayo bese ubulala amagciwane emhlabathini.

Ukulawula amakhemikhali: Kunconywa ukusebenzisa ukuvimbela isifo sikatamatisi okuvamile kanye nokulawula incwadi yokuvimbela jikelele.Ngenxa yokuthi kungazelelwe kakhulu futhi kunzima ukuvimbela, ukuthatha izikhathi ezingu-25% ze-Azoxystrobin 1500 zokuvimbela kuzoba nomphumela omuhle kakhulu.