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Bacterial Leaf Spot on Pepper and Basil: Keep Foliage Dry

Q: Black splotches on basil and pepper plants. Diagnosis?

A: Both have bacterial leaf spot—extremely difficult to control. Only cultural practice: keep leaves as dry as possible. Copper fungicides may give slight control.

Black Spots on Basil Leaves

Bacterial Spot on Pepper

basil bacterial spot

pepper bacterial leaf spot

About Gardening: Septoria Leaf Spot & Powdery Mildew in Kansas Garden; Leaf Spot Fungus and Identifying a Grassy Weed; Bacterial Leaf Spot: Symptoms, Copper Management & Mechanical Control; Cleyera Decline: Shade and Pruning Invite Leaf Spot; Cercospora Leaf Spot on Mustard and Turnip Greens; Peace Lily Leaf Spots: Diagnosing and Correcting Cultural Issues; Bacterial Leaf Scorch on Oaks: Diagnosis and Distinction from Drought Stress; Cercospora Leaf Spot on Cherrylaurel: Shade and Moisture Issues; Managing Iris Leaf Spot: Identification and Control; Maple Anthracnose: Rake Leaves, No Spray Needed

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