74 INSECTS OF ECONOAIIC IMPORTANCE 



grapes, cherries, apples, raspberries, roses and other 

 plants; a very serious pest on grapes but is liable 

 to occur locally; the adult beetles feed on the blos- 

 soms and when these arc gone, on the leaves and 

 berries. 



The adult beetles appear during the latter half of 

 June, mate, and deposit their eggs the last of June 

 and through July; the eggs are deposited in sandy 

 soil where they hatch and the white grubs feed on 

 the roots of grasses; the grubs become full-grown 

 by November and burrow down about one foot 

 where they pass the winter; early in the spring 

 they crawl back nearer the surface, feed for a time 

 and change to pup?e during the latter part of May ; 

 in about three weeks the beetles appear. So far as 

 observed these insects prefer sandy soil for breed- 

 ing and develop largely in grass lands especially 

 long-standing meadows. 



Control — Harrow the soil in which larv?e are 

 present making three harrowings from the last 

 week in May to the middle of June ; spray vines wath 

 arsenate of lead, 8 pounds to lOO gallons wnth two 

 gallons of molasses added; apply as soon as beetles 

 first appear on the vines; it is said that a mixture 

 of whale oil soap, 20 pounds, water, 100 gallons, 

 and crude carbolic acid, i pint, will kill the beetles 

 when hit and that this mixture will not injure apple 

 and cherry foliage. 



The grape leafiiopper ^ (TypJilocyba comes) 



Order — Hemiptera 



This leafhopper is often erroneously called 



''thrips'' ; it is an American insect and appears to 



be found wherever the grape grows; it is 1)ecoming 



of more importance but fluctuates in abundance 



5 Hartzell— N. Y. State Expt. Stat., Bull. 344. 

 Johnson— U. S. Bn. Ent., Bull. 97, Ft. I. 

 SHngerland — Cornell Univ. Expt. Stat., Bull. 215. 



