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Canker causing fungi attack branches and trunks causing dieback of parts or the entire tree. No chemical control measures are available. Keep the trees healthy and avoid unnecessary wounding. Infected areas have discolored bark, peeling bark, discolored sapwood, or a crack between the diseased and healthy bark.

A leaf spot caused by Cercospora condensata may be a problem. Rake up and dispose of infected leaves.

Powdery mildew may cause a white coating on the leaves but is seldom serious. If control is needed, use benomyl.

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Thyronectria canker on honeylocust - 27K
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