INSECTS INJURIOUS TO VEGETATION 



33 



manufacturing agricul- 

 tural implements, and 

 nearly three times the 

 estimated value of the 

 products of all the fruit 

 orchards, vineyards, and 

 small fruit farms in the A 



country. 1 



Even after the crops are harvested they are still 

 open to the attack of meal worms and other insects 

 that feed on stored grain and manufactured food- 

 stuffs. 



There are many thousands of insects that de- 

 serve to be mentioned, but our space is limited 

 and we must therefore refer to only a few that 

 affect us most directly. Each sort of plant is in- 

 fested with many kinds of insects, but usually only 

 a few of these are very destructive. Thus corn is 

 attacked by about two hundred different insect 

 enemies, clover by a like number, apple trees and 



Fig. 15. — A, moth of 



the army worm. 



B, the army worm. 



(After Riley.) 



apples by four 

 hundred, and oak 

 trees by probably 

 a thousand. 



Army Worm. 

 — We often read 

 in the daily 

 papers or in gov- 



Entomology with reference to its biological and economic as- 



Fig. 16. — The chinch bug: A, adult ; B, nymph; 

 C, eggs (enlarged) ; D, beak through which the bug 

 sucks its food. (After Riley.) 



iFolsom, J. W., 

 pects. 



D 



