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Black rot (Xanthomonas campestris pv. campestris) affects all cole crops. Early symptoms appear as small, yellowed spots on the margins of leaves. These areas will expand inward to form characteristic "v-shaped" lesions with brown centers and yellow margins. Lesions may merge to form large, blighted areas on the margins of leaves.

Black rot on leaves of savoy cabbage

(Photo: UK Vegetable IPM Team, University of Kentucky)

Management:

• Use Pathogen-free seed.
• Hot-water treatment of seed.
• Crop Rotation.
• Production of transplants away from production fields.
• Deep-turn soil after crop is finished.

• Fixed-copper and resistant varieties.

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