Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00000259
11/12/99
CALYCANTHUS DISEASE PROBLEMS
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.
Related information.
Pesticide Recommendations
Bacterial Crown Gall
Powdery Mildew
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This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
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