INSECTS AND THEIR CONTROL 



235 



trees in the pupal stage. Control may be effectively accom- 

 plished by the removal of the web nests containing the larvae, 

 especially in cool weather or at night when all the larvae are 

 within the nest, or by spraying with arsenate of lead or some 

 other good arsenical spray. 



347. Plum curculio (Fig. 119). A very common and se- 

 rious pest east of the Rocky Mountains, both of the stone- 



FIG. 119. The plum curculio. a, larva in fruit; 6, fruit 

 punctured by beetle; c, larva and pupa; d, adults. 



and pome-fruits, is the plum curculio. It does not occur in 

 any of the fruit-growing regions west of the rockies. 



The adult is one of the so-called snout beetles. These are 

 distinguished from other Coleoptera by the head being pro- 

 longed into a beak which is often as long as the remainder of 

 the body. The beetle punctures the skin of the apple, peach, 

 plum, or other fruit, depositing its eggs just beneath the surface 



