San Jose scale

San Jose scale
/san" hoh zay'/
a scale insect, Aspidiotus perniciosus, that is highly destructive to fruit trees and shrubs throughout the U.S. Cf. armored scale.
[1885-90, Amer.; named after SAN JOSE, California, where first found]

* * *

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.

* * *

insect
      a species of insect in the armoured scale family, Diaspididae (order Homoptera), that was first discovered in North America in San Jose, Calif., in 1880 but probably is native to China. The yellow-coloured females are covered with a gray circular scale about 1.5 mm (0.06 inch) in diameter, elevated in the centre and surrounded by a yellow ring. This waxy scale cover is secreted by the female and serves as a protective shell. After mating, the female produces living young called crawlers. There may be two to six generations per year.

      Sometimes San Jose scales can be serious pests, becoming so numerous that they overlap and completely cover tree branches. At those densities over time they may kill a tree. Historically, a lime-sulfur spray was once used as a control measure, but today, oil sprays are far more effective.

* * *


Universalium. 2010.

Look at other dictionaries:

  • San Jose scale — Scientific classification Kingdom: Animalia Phylum: Arthropoda Class: Insecta …   Wikipedia

  • San Jose scale — San′ Jose scale′ n. ent a scale insect, Aspidiotus perniciosus, that is highly destructive to fruit trees and shrubs throughout the U.S Compare armored scale • Etymology: 1885–90, amer.; after San Jose, California …   From formal English to slang

  • San Jose scale — ☆ San Jose scale [san′ hō zā΄ ] n. [after San Jose, Calif., where first observed in the U.S.] a scale insect (Quadraspidiotus perniciosus) that is very destructive to fruit trees and ornamental shrubs …   English World dictionary

  • San Jose scale — noun small east Asian insect naturalized in the United States that damages fruit trees • Syn: ↑Aspidiotus perniciosus • Hypernyms: ↑armored scale • Member Holonyms: ↑Aspidiotus, ↑genus Aspidiotus * * * noun …   Useful english dictionary

  • San Jose scale — noun Etymology: San Jose, California Date: 1887 a scale insect (Quadraspidiotus perniciosus) probably of Asian origin that is naturalized in the United States and is destructive to fruit trees …   New Collegiate Dictionary

  • San Jose, Occidental Mindoro — San Jose   Municipality   Aroma Beach in San Jose …   Wikipedia

  • San José Mogote — periods (ca. 1500 500 BCE) of Mesoamerican cultural development. [See Evans (2004, p. 122); also University of Michigan Museum of Anthropology (n.d.)] Situated in the fertile bottomlands of the Etla arm of the Valley of Oaxaca, the site is… …   Wikipedia

  • San Jose, California — This article is about the city in California. For other meanings of San Jose , see San José. San Jose   City   El Pueblo de San José de Guadalupe …   Wikipedia

  • San Jose del Monte City — Infobox Settlement official name = City of San Jose del Monte native name = Lungsod ng San Jose del Monte nicknames = The First Super City of Bulacan motto = flag size = image seal size = 110px image caption = map caption = Map of Bulacan showing …   Wikipedia

  • San Jose del Monte — City of San Jose del Monte Lungsod ng San Jose del Monte   Suburban city   Saint Joseph the Worker Parish Church …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”