Iklabishi imifino ethandwayo egcwele imisoco ebalulekile futhi ingajatshulelwa ezitsheni eziningi ezimnandi. Kodwa-ke, enye yezinto eziyingozi kakhulu ekukhiqizeni iklabishi emhlabeni wonke isifo sokukhunta esibangelwa i-Leptosphaeria maculans, eyaziwa ngokuthi i-black ring spot. Lesi sihloko sizohlola ukukhula nemiphumela yalesi sifo, futhi sinikeze nemininingwane yokuthi singasiphatha kanjani ngempumelelo.
I-black ring spot ibangelwa ukhunta i-Leptosphaeria maculans, ehlasela isitshalo seklabishi ngamahlamvu, ama-petioles, neziqu. Isikhunta sibangela amabala ayindilinga noma ayi-elliptical anendandatho emnyama ehlukile ewazungezile, engakhula aze afike ku-1 cm ububanzi. Lawa mabala angahlangana akhe izindawo ezinkulu ze-necrotic, okuholela ekuweni kwamaqabunga kanye nokunciphisa ukukhula kwezitshalo. Ezimweni ezimbi kakhulu, indawo emnyama yeringi ingabangela ukulahlekelwa okukhulu kwesivuno futhi iholele nasekuhlulekeni okuphelele kwezitshalo.
Isikhunta siphila emfucumfucwini yezitshalo nasenhlabathini, okwenza ukujikelezisa izitshalo kube indlela ephumelelayo yokulawula lesi sifo. Ukutshala izinhlobo zeklabishi ezikwazi ukumelana nakho kunganciphisa ingozi yokutheleleka. Ama-fungicides angasetshenziswa ukuvikela izitshalo ekuthelelekeni, kodwa kudingeka asetshenziswe ngokuvimbela futhi angadinga ukusetshenziswa okuningi phakathi nenkathi yokukhula.
Ukukhula kwebala elimnyama lendandatho kungaba nemiphumela emibi kakhulu ekukhiqizeni iklabishi. Lesi sifo singanciphisa isivuno, ikhwalithi, kanye nokudayiswa kweklabishi, okuholela ekulahlekelweni okukhulu kwezomnotho kubalimi. Ngaphezu kwalokho, ukusetshenziswa kwezibulala-sikhunta kungaba nomthelela omubi kwezemvelo futhi kwenyuse izindleko zokukhiqiza.
Ukuze kuncishiswe umthelela wendandatho emnyama ekukhiqizeni iklabishi, abalimi bangasebenzisa amasu adidiyelwe okulawula izinambuzane ahlanganisa izindlela zokulawula amasiko, izinto eziphilayo kanye namakhemikhali. Lawa masu ahlose ukunciphisa ukusetshenziswa kwezibulala-sikhunta futhi akhuthaze izindlela ezisimeme zezolimo.
I-Вlack ring spot ebangelwa i-Leptosphaeria maculans iyingozi enkulu ekukhiqizeni iklabishi emhlabeni wonke. Ukuphatha lesi sifo ngempumelelo kudinga inhlanganisela yokuvimbela, ukutholakala kusenesikhathi, nezindlela zokulawula. Ngokusebenzisa amasu adidiyelwe okulawula izinambuzane, abalimi banganciphisa umthelela we-black ring spot ezitshalweni zabo, bathuthukise isivuno nekhwalithi, futhi bakhuthaze izindlela zokulima ezisimeme.