oystershell scale

American  

[oi-ster-shel] / ˈɔɪ stərˌʃɛl /

noun

1. a scale insect, Lepidosaphes ulmi, having a scale shaped like the shell of an oyster, which infests various deciduous trees and shrubs.

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Etymology

Origin of oystershell scale

An Americanism dating back to 1875–80; oyster + shell

Example Sentences

Take some time now to check plants for problem pests like the invasive oystershell scale.

From Seattle Times

As you survey your landscape this winter, pay special attention to stressed plants and those susceptible to oystershell scale and other insect pests common in your area.

From Seattle Times

Regularly monitoring plant health, working with nature and strategically managing invasive pests like the oystershell scale can help improve the health, vigor and longevity of your landscape plants.

From Seattle Times