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Leaf Curling: The edges of heavily
infected leaflets curl upward on some cultivars. |
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"Powdery" Mycelial Growth - Small white patches of sparse mycelia (web-like growth) grow on the undersurfaces of leaflets in the early stage of this disease. Tiny, semi-transparent conidia give the patches a powdery appearance. |
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Cleistothecia (tan to dark brown spherical reproductive structures)
occasionally develop on the lower leaf surface. |