1 16 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



quarters of an inch. The front wings are mottled or marbled, 

 especially near the central area, and usually there is visible 

 a fine white line a short distance from the edge and parallel 

 to it. The hind-wings have a fringe of darker hair as well 

 as veins that contrast somewhat with the lighter portion" 

 (Fig. 97). 



Control. Deep fall plowing and thorough harrowing will 

 break up the pupal cells and thus largely prevent the develop- 

 ment of the spring brood of moths. In perennial crops like 

 alfalfa thorough disking may be used 'and on lawns deep raking 

 with a long-toothed steel rake will kill many of the pupae. In 

 fields of young grain and on lawns many of the caterpillars may 

 be killed by a heavy roller. When not present in too large 

 numbers, the worms may be destroyed by spraying the food 

 plants with Paris green, arsenate of lead or other arsenicals, 

 or by the use of poisoned bran mash. When present in large 

 numbers and the army habit is assumed they should be com- 

 bated the same as the army-worm. 



