INSECTS INJURIOUS TO THE APPLE AND PEAR 527 



legs, antennae, and eyes, after the first molt, and when full grown 

 is an elongate, yellowish, jelly-like mass, being simply a " repro- 

 ductive sack, with her sucking mouth parts, through which the 

 food is taken, inserted in the tissues of the plant." The females 

 become full grown in about eight to ten weeks, when they lay 

 from 40 to 100 eggs and then die. In the North there is but 

 one generation a year, but from the District of Columbia south- 

 ward there is a partial or complete second generation. When 

 the male insects are full grown they emerge from the scales as 

 two-winged flies, fertilize the females and die at once. 

 Control See below 



The Scurfy Scale * 



"The Scurfy Scale, while infesting a considerable number of 

 plants (some 35 in 

 number), is a less 

 general feeder than 

 the preceding spe- 

 cies. It occurs prin- 

 cipally upon ros- 

 aceous plants, such 

 as the apple, peach, 

 pear, plum, cherry, 

 etc., and also on 

 currant and goose- 

 berry among cultiv- 

 ated plants, but 

 seldom becomes so 

 abundant as to 

 cause particular in- 

 j u r y or require 

 specific treatment." 

 It is especially com- 

 mon on apple and 







[G. 456. The scurfy scale (Chionaspis furfura 

 Fitch) : a, c, females, b, d, males a, 6, natural 

 size, c, d, enlarged. (After Howard, U. S. 

 Dept. Agr.) 



pear and less so on cherry and peach, though it has been observed 

 as quite destructive to peach in the South, greatly stunting the 

 trees, though none were actually killed. The female scale is a 



* Chionaspis furfura Fitch. Family Cocddce. See Quaintance and 

 Sasscer, I.e. 



