CALYCANTHUS DISEASES
CALYCANTHUS DISEASES
Bacterial crown gall causes warty-looking growths on the stems near the soil line. There is no practical control measure for this problem. Destroy infected plants and avoid planting in contaminated soil.
Powdery mildews of different genera cause 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
