198 



INSECTS INJURIOUS TO STAPLE CROPS. 



it, but investigation shows that its eggs are laid only upon 

 stalks which have already been damaged in some other 

 manner. 



Fig, 112. — Cotton Stalk borer (At xi' cryytci). a, larva from above; 

 h, larva from side; c, tunneled cotton-stalk showing exit-hole; 

 d, adult beetle — all enlarged except c. (After Howard, U. S. 

 Dept. Agr.) 



INJURING THE BOLL. 



Sharpshooters. 



Bolls are frequently damaged by leaf -hoppers, known to 

 science as Homalodisca coagulata, which injury is termed 

 ''Sharpshooter work" by the planters. Usually they do 

 not make their appearance till after the first of June. 

 Before that they prefer the foliage of poplar and other 

 shade trees near the cotton-field. Where the injuries are 

 of annual occurrence it would be well to ascertain the 

 trees upon which the insects are feeding, early in the 

 season, and give them and neighboring undergrowth a 



