Michigan State University Extension
Ornamental Plants plus Version 2.0 - 00000041
01/01/98
ACHILLEA DISEASE PROBLEMS
Powdery mildew causes a white coating on the leaves.
Stem rot causes decay of the stem bases. In wet weather,
a cobwebby growth develops on the lower stem. The lower
leaves rot and the upper portions of the plant wilt and
die. No chemical control is listed.
Bacterial crown gall causes formation of round, rough
galls on the plant near the soil line. The bacteria may
enter the plant through wounds. Remove and destroy
infected plants. Avoid wounding and infested soil. No
chemical control is listed.
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This file was generated from data base OP on 07/27/98.
Data base OP was last revised on 01/01/98.
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