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

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

 sucks its food. (After Riley.) 



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- 



1 Folsom, J. W., Entomology with reference to its biological and economic as- 

 pects. 



