Bacterial blight (Leaf spot)

Leaves show dark lesions with water-soaked margins while shoots may develop expanding cankers. This bacterial disease spreads by rain splash. Improve air circulation and disinfect tools.

Remove blighted tissue promptly, cutting well below visible symptoms. Improve air circulation by thinning dense growth. Avoid overhead watering, especially during bloom and new growth periods when tissues are most susceptible. For recurring problems, preventive fungicide applications timed to protect new growth can reduce infection, but cultural controls should be your first approach.