Michigan State University Extension
Ornamental Plants plus Version 2.0 - 00000449
01/01/98
COTONEASTER DISEASE PROBLEMS
Leaf spots are a rare problem caused by one of several
fungi.
Cankers or twig blights are caused by fungi in the genera
Physalospora, Diplodia and Gibberella. When a canker
girdles the stem, the growth beyond the point of infection
dies. There is no chemical control. Prune out the
infected stems.
Cotoneasters are susceptible to fire blight, though C.
adpressa is reportedly resistant. There is no chemical
control for the disease. The disease kills the branch
tips and the leaves appear scorched. Prune out infected
twigs and avoid using high nitrogen fertilizer.
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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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