Ganye mai launin toka kuma ana kiran tabon ganyen sesame ta manoman kayan lambu wajen samarwa.Ya fi lalata ganye, kuma a lokuta masu tsanani, petioles ma sun lalace.A farkon mataki na cutar, an rufe ganye da ƙananan ɗigon haske mai launin ruwan kasa.Launuka suna jika da ruwa kuma ba bisa ka'ida ba.Sashin tsakiya na raunuka shine launin toka-launin ruwan kasa zuwa rawaya-launin ruwan kasa.Gefen raunukan su ne rawaya-launin ruwan kasa halos.Launuka sun nutse kuma suna da diamita na 2 zuwa 5 mm., raunuka suna da wuyar samun perforation a cikin matakai na gaba.

【Alamomin da ke faruwa】 Launukan suna da ja-ja-ja-jaja-rawaya.A farkon farkon farawa, ganyen suna nuna ƙananan aibobi masu launin ja-launin ruwan kasa.Tsakanin raunin yana da launin toka mai haske, kuma halo mai launin ruwan kasa yana bayyana a gefe da gefe.Launukan sun ɗan fi girma fiye da wurin ganyen launin toka kuma launi ya fi haske.Bayan fadadawa, raunukan sun zama masu zagaye da launin ruwan kasa kuma ganyen sun zama rawaya.Rigakafin da maganin tabo mai launin ruwan kasa iri ɗaya ne da ta wurin ganye.

【Dalilin cutar】Magungunan ƙwayoyin cuta sun mamaye filayen kamar yadda mycelium da marasa lafiya suka ragu.Kwayoyin kwayoyin halitta suna yaduwa ta hanyar iska, ruwan ban ruwa, da ruwan sama, kuma suna mamaye ta stomata.Dumi, danshi, yanayi na damina, dasa shuki mai yawa, da yanayin iska suna saurin kamuwa da cutar.Ambaliyar ruwa, zafi mai zafi, rashin isasshen haihuwa, raunin tsiron tsiro da cutar da cututtuka masu tsanani.Gabaɗaya, dasa shuki a wuraren da aka kayyade a cikin bazara yana da yawan kamuwa da cuta fiye da lokacin kaka, kuma saurin cutar yana da sauri.Saboda yawan amfanin ƙasa na tushen dashen 'ya'yan itace, isassun takin gargajiya da takin mai magani na buƙatar saka hannun jari.Akasin haka, asarar da cututtukan cututtuka ke haifarwa saboda haihuwa da kuma kulawa da yawa ba makawa., ya kamata a mai da hankali sosai da kuma hanawa da wuri.

【Hanyar ceto】
Kula da muhalli: Dasa shuki mai ma'ana.Girman nau'ikan da aka gabatar gabaɗaya ya fi na nau'in gida, amma yawan amfanin ƙasa ya fi girma.A rika amfani da takin zamani da takin mai magani yadda ya kamata da takin mai magani na phosphorus da potassium, yana karfafa sarrafa filin, rage zafi, da inganta iskar iska da watsa haske.Bayan karbar kayan, da sauri cire ragowar marasa lafiya kuma a lalata ƙasa.

Gudanar da sinadarai: Ana ba da shawarar yin amfani da rigakafin cutar tumatir gabaɗaya da kuma kula da takardar magani don rigakafin gaba ɗaya.Saboda yana da kwatsam kuma yana da wuyar hanawa, shan 25% Azoxystrobin sau 1500 don rigakafi zai sami sakamako mai kyau.