PHILADELPHUS DISEASES
PHILADELPHUS DISEASES
A canker, caused by Nectria cinnabarina kills the stems. Prune out and destroy infected stems. There is no chemical control for the disease.
Leaf spots of various types may be a problem in rainy seasons. Pick off and destroy infected leaves. Use basic copper sulfate for severe infections.
Powdery mildews of different genera causes a white coating on the leaves. Use sprays of benomyl or sulfur.
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by the editors of Old-House Interiors magazine
by the editors of Old-House Interiors magazine
