Periods of high humidity and frequent rain are ideal for the germination of certain fungal spores and the spread of disease. Anthracnose is one of those diseases. It causes the plant's leaves to fall and the entire plant may die. Powdery mildew is common on cucuzza plants as well. Although it generally doesn't kill the plant, it may cause it to lose enough foliage to stress it and leave it susceptible to other diseases and pests. Fusarium wilt spores are carried from the soil to the cucuzza by the cucumber beetle.
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Symptoms
Fungal leaf diseases generally cause spots or splotches on the foliage. If you look closely, you may see the black fruiting bodies somewhere in the spots. Anthracnose symptoms include black or rusty brown spots that may be angular or round. If the spots are round and appear powdery, the plant has powdery mildew. Fusarium wilt, a dangerous fungal disease, turns leaves yellow.
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Solution
Copper- or sulfur-based fungicides help control anthracnose. Remove infected plants and spray the rest with the fungicide every seven to 10 days. Use neem oil or sulfur to deal with powdery mildew. The fungicide must be applied at the first sign of the disease. Unfortunately, there is no solution for cucuzza plants with fusarium wilt. Remove infected plants and use preventive measures in the future.
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Prevention
Preventing fungal diseases is not difficult. Avoid working on the plants when the soil is wet and water them slowly as many diseases are spread by soil-dwelling spores being splashed onto the foliage. Water at the soil, not overhead to avoid wet foliage that acts as the perfect germination spot for some fungal spores. Keep the soil clean of all debris as leaves and other debris harbor fungi. Disinfect gardening tools before using them near the cucuzza. Finally, pick off and dispose of infected leaves.
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