GRAPE INSECTS 



401 



the poison and die so slowly that the injury to the crop is 

 not prevented. Recent work in western New York, how- 

 ever, has shown that if the arsenate of lead is sweetened with 

 molasses or glucose, the 

 beetles eat it readily and 

 many are killed within 

 twenty-four hours. At 

 present this is the most 

 feasible method of con- 

 trolling this pest. The 

 vines should be sprayed 

 thoroughly at the first ap- 



FiG. 345. — Larva of the rose chafer. 



Fig. 344 a. — Eggs of the 

 rose chafer in their earthen 

 cells ; egg, greatly enlarged. 



Fig. 34(). — Rose chafer pupie (x 3) 



pearance of the beetles, using 8 pounds of arsenate of lead to 

 100 gallons of water sweetened with two gallons of molasses. 

 If the beetles are very abundant, a second application, about 

 one week later, is sometimes necessary. 



2d 



