Parasite of cabbage worm. Diseased looper Adult parasite on imported cabbage worm pupa. Predatory stink bug Syrphid larva feeding on an aphid. Symptoms first appear as water-soaked spots on leaves. Avoid planting in fields with a history of Sclerotinia disease, maintain adequate fertility, proper insect and weed management.
Symptoms initially appear as water soaked areas on wounded leaves.
As the disease progresses, leaves become soft and begin to liquify. Avoid wounding plants during cultivation and harvesting. Bury crop residue and rotate with corn or small grain to reduce bacterial populations. Black rot is caused by the bacterium Xanthomonas campestris pv. Black rot symptoms appear initially as V-shaped areas along the outer leaf edges.