360 FRUIT INSECTS 



The Walnut Scale 



Aspidiotus juglans-regice Comstock 



Mature female scales of this species are pale grayish-brown 

 in color with the reddish-orange exuvial spot one side of the 

 center, and they are larger than the San Jose scale, being about 

 I of an inch in diameter. The species is oviparous, hibernated 

 adult females laying eggs early in the spring, and eggs for another 

 brood are laid in June. There are two and possibly three 

 generations of this scale insect in the South, yet it rarely 

 occurs in injurious numbers. We have seen currant stems 

 incrusted with it, and it also occurs on apple, pear, cherry, 

 peach, apricot and plum, besides on its only food-plant in 

 California, the Enghsh walnut. It is widely distributed over 

 the United States and occurs in Canada. 



This walnut scale will doubtless succumb to thorough appH- 



cations of the winter washes recommended for the San Jose 



scale. 



Other Currant and Gooseberry Insects 



Green fruit-worms : apple, p. 39. 

 Fruit-tree leaf-roller : apple, p. 62. 

 Oblique-banded leaf-roller : apple, p. 65. 

 Climbing cutworms : apple, p. 138. 

 San Jose scale : apple, p. 162. 

 Oyster-shell scale: apple, p. 171. 

 Putnam's scale : apple, p. 179. 

 Apple leaf-hopper : apple, p. 18D. 

 Flat-headed apple-tree borer : apple, p. 194. 

 Flea-beetles : apple, p. 203. 

 European pear scale : pear, p. 234. 

 European fruit-tree scale : plum, p. 260. 

 European fruit lecanium : plum, p. 261. 

 Cherry scale : cherry, p. 312. 

 Red-spider : raspberry, p. 315. 

 Imbricated snout-beetle : strawberry, p. 371. 



