Black rotCaused by: Xanthomonas campestris
Problem Category: Bacterial Disease
Symptoms: Irregularly shaped dull yellow areas along leaf margins which expand to leaf midrib and create a characterstic "V-shaped" lesion; lesions may coalesce along the leaf margin to give plant a scorched appearance.
Comments: Pathogen is spread via infected seed or by splashing water and insect movement; disease emergence favored by warm and humid conditions.
Management: Primary method of controlling black rot is through the use of good sanitation practices; rotate crops to non-cruciferous crops every 2 years; plant resistant varieties; control cruciferous weed species which may act as a reservoir for bacteria; plant pathogen-free seed.
Control: spray 2 times Cowdung+Asafoetida solution in 10 days interval.