60 



THE STALK BORER. 



formations the following year. From abont the middle of 

 June (sometimes earlier), the brownish moths begin to emerge 

 from the pupae, and are found flying way into September. 



'*§! 



■.,H 



V 



M I 



Fig. 50. — Army worm, L.' uniptmctata. 



In their marches, it is asserted, the caterpillars will some- 

 times destroy young fields of flax, by biting oft' portions of the 

 plants without utilizing' them for food, and when feeding on 

 oats, too, they work the greatest injury by causing kernels 

 which are not eaten to fall to the ground. 



Treatment : The most effective method of combating" the 

 army worm is ditching; if two or more furrows be turned 

 up with a plow between the advancing army and the crop 

 which it threatens, the steep side of the furrow being toward 



