Kalmar “black rot” gabaɗaya tana nufin cutar da tsire-tsire ke haifar da cututtukan fungal iri-iri waɗanda ke shafar nau'ikan tsire-tsire, gami da 'ya'yan itatuwa, kayan marmari, da kayan ado. Ciwon yana haifar da duhu, dusar ƙanƙara a kan ƙwayar shukar da ta shafa, wanda a ƙarshe zai iya haifar da mutuwar shuka idan ba a kula da shi ba. Kalmar “black rot” kuma tana iya nuni da wata cuta ta musamman da ke shafar kurangar inabi, da cutar fungus Guignardia bidwellii ke haifarwa, wanda kan yi illa ga amfanin gonar inabin idan ba a kula da shi ba.