138 



FRUIT INSECTS 



ful. The caterpillars often devour the leaves as fast as they 

 appear and it is difficult to keep the surface of the rapidly ex- 

 panding leaves covered with the poison ; furthermore, the 

 caterpillars are larger then and consequently harder to kill. 

 If for any reason the destruction of the winter nests has been 

 neglected, and spring spraying must be employed, some good 

 can be accomplished by using arsenate of lead, 10 to 14 pounds 

 in 100 gallons of water. 



References 



Fernald & Kirkland, The Brown-tail Moth. 1903. 

 U. S. Farmers' Bull. 264. 1906. 

 U. S. Bur. Ent. Bull. 87. 1910. 

 U. S Farmers' Bull. 564. 1914. 



Climbing Cutworms 



The sleek, plump, dull-colored, obscurely marked caterpillars 

 (Fig. 151), ranging from one to nearly two inches in length 



and commonly known 

 as cutworms, attack 

 nearly all kinds of 

 field and garden crops, 

 and some of them 

 often climb fruit trees, 

 bushes and grapevines 

 at night to eat the 

 opening buds. More 

 than a dozen different 

 kinds of these climb- 



FlG. 151. — One of the climbing cutworms, Poru- -^^^ CUtwormS liaVC 

 sagrotis vetusta (X 1^). * . 



been caught at their 

 destructive work and identified as follows : 



The yellow-headed cutworm (Hadena arctica Boisduval). 

 The white-spotted cutworm {Homohadena badistriga Grote). 



