Black<unk> , also known as black<unk>  disease can be caused by different types of fungi and bacteria. Most common being Asterina, Asterinella, Diplotheca, Glomerella, Gnomonia, Schizothyrium, Placosphaeria, and Stigmea. Black<unk>  can affect many different plant species during wet, damp climate. It may appear as black<unk> s on leaves, stems, and flowers.
Black spot leaf disease
Ascochyta diseases of pea
Scabies
Black rot 
Demodicosis
Foot-and-mouth disease
Chancroid
Zoonosis