Source : Webster's Revised Unabridged Dictionary (1913)

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.

Source : WordNet®

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