Entomology

University of Wyoming Extension

Cottony Maple Scale

Cotton balls on your maple? Or on elms, willows, or poplars? Look again. These are the egg sacs of a unique insect pest that is hard to control in adulthood. If physical removal doesn't suffice, a systemic plant insecticide is required.

Photo: Pennsylvania Department of Conservation and Natural Resources - Forestry Archive, Bugwood.org

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