Powdery mass covering entire leaf
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It is characterised by typical mildew growth which is generally confined to the under-surface of the leaf.
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When the infection is severe the upper-surface is also covered by the whitish growth of the fungus.
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Light green patches, corresponding to the diseased areas on the under surface, are visible on the upper side especially when the leaves are held against light.
Management
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When weather is comparatively dry spray twice Wettable Sulphur 3g/lit at 15 days interval , starting from 3 months after sowing.
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Spray 1ml Hexaconazole or 2ml Dinocap /lit of water at fortnight intervals. The variety Jwala is resistant to this disease.
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