STATE POMOLOGICAL SOCIETY. 



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birth to living young, several hundred in a generation, and there 

 are at least four generations in a season. It is intimated that the 

 progeny of a single female in a season, provided they all lived, 

 would reach 3,000,000,000. The scales are small and not 

 readily detected by the casual observer. It is a general feeder 

 attacking the fruit of many kinds of deciduous trees. Millions 

 of dollars" worth of fruit trees have been already destroyed by it, 

 and it is spreading rapidl}'. 



Howard, Entoinologiciil Division, U.S. Dept. of Agriculture, 18;)4. 

 THE SAN .JOSE, OR PERXICIOUS, SCALE. (Aspidiotus pernicioaus.) 

 On pear fruit and twig, with enlarged male and fenial scales (original). 



Means of Distribution — Through nursery stock. The pest 

 has spread in the United States from infected nurseries. After 

 it is introduced it may be spread locally by birds, other insects, 

 the wind, teams used in cultivating, cions and buds used in 

 grafting, leaves and fruit, and also from tree to tree by inter- 

 locking of branches and in the nursery row by thick planting. 



