Horticulture/Lepidosaphes ulmi

Lepidosaphes ulmi also known as oystershell scale are ../Scale Insects/ that is a pest on woody plants. The small insects attach themselves to bark and cause injury by sucking the tree's sap, this metabolic drain on the plant may kill a branch or the entire tree.

Description
White scales.

Symptoms and Signs
Scales are clearly visible.

Host plants

 * ../Acer/ (Maples)
 * ../Cornus/ (Dogwoods)
 * ../Hydrangea/
 * ../Ilex/ (Hollies)
 * ../Lonicera/ (Honeysuckles)
 * ../Salix/ (Willows)