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oystershell scale

[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.
Also called oyster scale.
Origin
1875-1880
1875-80, Americanism; oyster + shell
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Article for oystershell-scale

oystershell scale

a species of insect in the armoured scale family, Diaspididae (order Homoptera), that is found on woody plants and secretes a hard, tough protective covering that resembles a miniature oystershell. Despite its small size, the oystershell scale can inflict great damage on the trees and shrubs on which it lives. Control is by dormant, or horticultural, oil spray and natural enemies such as birds, mites, and parasitic wasps.

Learn more about oystershell scale with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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