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STATE HOETI CULTURAL SOCIETY. 



THE SAN JOSE, OR PERNICIOUS SCALE. 



{Aspidiotus perniciosns, Comstock.) 



The San Jose scale (Aspidiotus pemiciosus) on pear fruit and branch, with enlarged male and 

 female scales. From Department of Agriculture. 



The illustration here given graphically represents a recently in- 

 troduced pest of the bark-louse family, with which, happily, neither the 

 horticulturists nor the entomologists of Missouri have as yet much 

 personal knowledge. The following notes and descriptions are com- 

 piled mainly from Mr. Howard's valuable bulletin of recent date en- 

 titled "Some Scale Insects of the Orchard." 



My object in devoting a little space to it in this report, is to warn 

 our nurserymen and orchardists of a danger which menaces them, and 

 to stimulate them to observe more carefully and quarantine against 

 more rigidly all importation of trees and shrubbery from sections of 

 the country already invaded by this most to be dreaded of all scale 

 insects. This has become the more imperative since the reception of 

 a letter last season from Mr. E. J. Walker of Blue Springs, Mo., ac- 

 companied by twigs upon which were a few unmistakeable speimens 

 of the pest. Later in the season I received another letter, through 

 Mr. Goodman, from Cassville, Mo., making very especial inquiries con- 



