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Extension > Garden > Diagnose a problem > What insect is this? > Trees and shrubs > Not obvious insects: Insects that do not resemble insects > Cottony maple scale

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Cottony maple scale

Pulvinaria innumerabilis

Cottony maple scale

Jeff Hahn, University of Minnesota Extension


Description: 1/8 inch long. Flattened, oval, brown, eventually enlarging to hemispheres with a white, cottony mass underneath. Produces honeydew, a shiny, sticky substance.

Where/When: Found on branches of hardwood trees including maple, linden, hackberry, and honeylocust. Most noticeable in May through June.

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