Symptoms
Patches of white, powdery fungal growth on the underside of the leaves; yellow to brown discoloration of the upper leaf; edges of leaves may curl upwards exposing the underside of the leaf; leaves may begin dropping from plant
Cause
Fungus
Comments
Disease can occur in both humid and dry conditions; disease spreads most rapidly in humid conditions; disease commonly affects older leaves
Management
Apply appropriate fungicide if disease is severe
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