Question: what are the crop diseases?
Answer: Anthracnose. Infected plants develop dark, water soaked lesions on stems, leaves or fruit. ... 
Apple Scab. Scabby spots on fruits and leaves are sunken and may have velvety spores in the center. ... 
Bacterial Canker. ... 
Black Knot. ... 
Blossom End Rot. ... 
Brown Rot. ... 
Cedar Apple Rust. ... 
Club Root.