San Jose scale


San Jo·se scale

noun \ˌsa-nə-ˈzā-, ˌsan-(h)ō-\

Definition of SAN JOSE SCALE

:  a scale insect (Quadraspidiotus perniciosus) probably of Asian origin that is naturalized in the United States and is destructive to fruit trees

Origin of SAN JOSE SCALE

San Jose, California
First Known Use: 1887

San Jose scale

noun    (Concise Encyclopedia)

Species (Aspidiotus perniciosus) of scale insect first discovered in North America at San Jose, Cal., in 1880 but probably a native of China. A waxy gray secretion (the scale) covers the yellow females, which are about 0.06 in. (1.5 mm) in diameter. The scale is elevated in the center and is surrounded by a yellow ring. The female produces several generations of living young each year. San Jose scales can completely cover tree branches and may eventually kill the tree.

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