GRASS-HOPPER CONTROL 



la- 



attached to the top of the pan and with the other edge resting on the 

 projecting runners. This permitted the young nymphs to gain en- 

 trance to the pan by a series of two or three jumps and proved to be 

 a valuable idea. 



The entire meadow was gone over twice the first day and large 

 quantities of hoppers w^ere taken. About two weeks later it was 



Fig. 34. — Blossoming time in Krebill's meadow. 



Fig. 35. — A badly damaged field. Head.s all gone, leaves going. 



found that many new nymphs had hatched. The hopper-dozer was 

 used again as before and this operation was repeated the third time 



