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Damage Symptoms
Leaves, fruits and
stems are affected:
Leaves: Small watersoaked spots become brown, circular,
and remain less than 3-cm in diameter. Numerous lesions may come
together, causing necrotic areas. Leaves generally turn yellow
and drop, but some may dry and hang on the plant.
Fruit: Small, raised, corky, dark lesions.
Stems and Petioles: Lesions are elliptical.
Conditions
for Development
The pathogen is seedborne and
persists in infected crop debris. Many strains attack tomato
and pepper. Disease severity is enhanced by extended rainy periods
and high temperatures.
Control
Use disease-free seed or transplants. Rotate crops. Remove infected
crop debriis. Keep seedbeds separated from production fields.
Use copper or copper + mancozeb sprays. Use rain shelters and
mulches to reduce water splash, thereby reducing disease severity
during rainy seasons. Use furrow irrigation. |
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