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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 > Oystershell scale

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Oystershell scale

Lepidosaphes ulmi

Oystershell scale

Jeff Hahn, University of Minnesota Extension


Description: 1/8 inch long. Light to dark brown or purplish-gray waxy oyster shell-shaped insects.

Where/When: Found on branches of many different trees and shrubs including aspen, ash, cottonwood, dogwood, lilac, maple and willow. Present throughout the year.

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