Phoma blight is an infectious fungal disease caused by various Phoma species and symptoms include brown or black lesions on the leaves, stems, and fruits, wilting, and eventually death of the plant.
Signs of damage:
The spots on cucurbit leaves produced by the Phoma blight are usually more irregular in shape and most often are on the margin of the leaves. The spots are light brown on cantaloupe and cucumber and dark brown on watermelon. Fewer lesions are produced on stems but symptoms also tend to spread from the crown of the plant, giving the plant a blighted appearance. Fruit are generally not affected.
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