Michigan State University Extension
Ornamental Plants plus Version 2.0 - 00000318
01/01/98
CELTIS DISEASE PROBLEMS
Several fungi cause leaf spots on Hackberry. The disease
is worse during wet weather but chemical controls are
seldom needed.
Witches broom is caused by a mite and powdery mildew,
Sphaerotheca phytoptophila. The main symptom is clusters
of twigs scattered throughout the tree crown. Prune out
the clusters of twigs when practical.
Powdery mildew may coat the leaves with white powder. The
leaves may be uniformly coated or only in patches.
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mentioned. This information becomes public property upon
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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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heatley@msue.msu.edu . Please read our
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