San Jose scale

from WordNet (r) 3.0 (2006)

San Jose scale
    n 1: small east Asian insect naturalized in the United States
         that damages fruit trees [syn: {San Jose scale},
         {Aspidiotus perniciosus}]

from The Collaborative International Dictionary of English v.0.48

San Jos'e scale \San Jo*s['e]" scale\
   A very destructive scale insect ({Aspidiotus perniciosus})
   that infests the apple, pear, and other fruit trees. So
   called because first introduced into the United States at San
   Jos['e], California.
   [Webster 1913 Suppl.]