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CUES: Center for Urban Ecology and Sustainability

Diagnosis Case: Elm

picture of Elm Signals of flagging (yellowing of a portion of the crown) or wilting are good indicators that the elm tree has Dutch Elm Disease. This means that either Native Elm Beetles or European Elm Bark Beetles were present on the tree. Elm Leaf Beetles do not transmit the disease. At the point of flagging or wilting, pruning measures can be used to prevent the disease from rapidly killing the rest of the tree.


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Last modified on March 06, 2013