Alternaria leaf spot
Common Name
Scientific Name
Alternaria brassicae
Issue
Fungal
Causes
Weeds from the family cruciferae may harbour the fungus. The disease is most damaging under wet warm conditions.
Prevention
Crop rotation should be practiced . Use disease-free transplants. Hot water treatment of own seed to prevent the disease. Field hygiene
Control
Always remove infected plant debris or destroy it after the season