Alternaria leaf spotCaused by: Alternaria brassicae
Problem Category: Fungal Disease
Symptoms: Small dark spots on leaves which turn brown to gray; lesions may be round or angular and may possess a purple-black margin; lesions may form concentric rings, become brittle and crack in center; dark brown elongated lesions may develop on stems and petioles.
Comments: May become a problem on cabbage during cool, wet periods
Management: Plant only pathogen-free seed; rotate crops; applications of appropriate fungicides control disease when present.
Control: Spray 3% Daspatra kashyam after 30 DAS.