146 



PESTS OF GARDEN AND FIELD CROPS 



out from these quarters 

 early in the spring, and 

 begin laying eggs as soon 

 as food plants are avail- 

 able. Usually the over- 

 wintering beetles live 

 and continue laying 

 eggs for a considerable 

 period. The grub en- 

 ters the ground to pu- 

 pate, when it has be- 

 come full grown. There 

 are two generations an- 

 nually. 



Poisoning by means 

 of Paris green and lime, 

 or lead arsenate, is the 

 simplest and best 

 Eggs of the Colorado Potato-beetle, remedy. Use a rather 

 Slightly enlarged. Original. j^^^vy dose and apply 



early, as soon as the potato tops are a few inches liigh, repeating 



as needed. 



Fig. 144. 



The Three-lined Potato Beetle (Lema trilineata Oliv.) 



Injury by this species is about 

 the same as that done by the 

 Colorado potato-beetle. The 

 eggs are laid along the midrib 

 of the leaf. The larva covers 

 itself with a mass of excre- 

 ment. The adult is a hand- 

 some beetle, its body striped 



with light yellow and black. 



T^ , .1 • " ,. ,1 , Fig. 145. — The Three-lined Potato 



Its length IS a little more than beetle. Enlarged and natural size, 



one third of an inch. There Original. 



