222 THE GRAPE 



will be done, since each worm practically destroys a bunch 

 of grapes, while the later brood destroys only the berry. 



Spraying with arsenate of lead at the rate of 2 pounds to 

 50 gallons of water is effective in destroying this insect. 

 Where the vines are sprayed with Bordeaux mixture the lead 

 can be added to it and both sprayed on at the same time. 

 A little soap sticker added to the solution will cause it to 

 adhere better to the berries. The first spraying should be 

 given just before the blossoms open, the second just as the 

 grapes finish blooming and the third during the early part 

 of July. Picking and destroying all of the infested berries 

 will aid materially in combating this insect. 



Grape Curculio. — The injury of the grape curculio closely 

 resembles that of the grape berry moth. The grape curculio 

 also causes wormy grapes, but the damage is somewhat 

 different from that of grape berry moth. The adults are small 

 weevils which pass the winter in or near the vineyards. 

 They usually hibernate under trash or rubbish, and appear 

 in the spring about the time the grapes bloom. The insects 

 feed on the foliage until the grapes are about one-fourth 

 grown. The adult then cuts a very characteristic crescent- 

 shaped hole in the grape, under the flap of which the egg is 

 laid. The larvse soon hatch and bore into the pulp, where it 

 feeds until it reaches maturity. 



Spraying the vines with arsenate of lead at the rate of 2 

 pounds to 50 gallons of water while the grapes are small will 

 kill many of the adults. If this procedure is followed out 

 very little damage will result from this insect. 



SPRAYING OUTLINE FOR THE GRAPE. 



If additional sprayings are necessary use Bordeaux mixture. 



