1146 THE FRUIT INDUSTRY IN XEW YORK STATE 



Control 



Cherries may be protected from maggot injury by killing tbe 

 parent flies with a sweetened poisoned spray before they have de- 

 posited their eggs. The poison should be applied at^the first ap- 

 pearance of the flies and should be repeated weekly, or after each 

 rain, since the poison is easily Avashed off. This treatment should 

 be continued until no more flies are found on the trees. Good 

 results in killing the flies have been obtained by using the fol- 

 lowing mixture: arsenate of lead, 3 ounces; molasses, 1 pint; 

 water, 4 gallons. 



It is not necessary to use a large quantity of this mixture, or to 

 make a thorough application one pint is sufficient for a tree of 

 moderate size. The liquid should be sprinkled over the tree in 

 rather large drops; a small garden syringe, holding about a pint, 

 will be found convenient for the purpose. 



FIG. 372. CHERRY LEAVES CURLED BY 

 APHIS 



(Photo by Matheson.) 

 THE CHERRY PLANT-LOUSE 



This blackish plant-louse (Myzits cerasi) is a serious enemy of 

 both sour and sweet cherries, but is more injurious to the latter. 

 The winter is passed in the egg stage. The black, shining eggs are 



