68 INSECTS OF ECONOMIC IMPORTANCE 



colonies reniainino- here and there; in September 

 winged forms return from the pepper-grass and the 

 egg-laying females deposit their eggs; the cherry 

 foliage may sometimes be blackened with these lice; 

 the winged and wingless forms are deep shining 

 black and the body is rather broad and fiat; they 

 curl leaves badly. 



Control — Spray wath nicotine sulphate, }i pint 

 to lOO gallons of water with 4 pounds of soap 

 added before the buds break; spray thoroughly. 



The cherry fruit-flies ^'^ (RJiagoIetis cingulata) 



(RJiagolctis fausfa) 

 Order — Diptera 



These flies are very similar in appearance to the 

 apple maggot fly ; the eggs are inserted beneath the 

 skin of the cherries a short time before they begin to 

 redden; infested cherries do not show any effects 

 of the tgg laying or of the maggot within for some 

 days; w^hen cherries are left on the tree or picked 

 a portion of each fruit will rot and sink in on the 

 side ; the maggot is yellowish-white and a little over 

 a quarter of an inch long; it is straight while the 

 larva of the curculio that lives in cherries is usually 

 more or less curved; the maggots leave the fruit 

 when full-grown and enter the ground where they 

 change to pup?e and remain until the following 

 spring; there is only one brood a year; the insects 

 are confined mainly to sour varieties of cherries. 



Control — Spray with arsenate of lead, 5 pounds, 

 water 100 gallons, and 2 gallons of molasses; apply 

 just as cherries begin to redden or when flies first 

 appear; if it rains repeat in a week or ten days. 

 There is evidence to show that arsenate of lead 

 alone in water will control the insects. 



57 SHngerland— Cornell Univ. Expt. Stat., Bull. 172. 

 Illingworth — Cornell Univ. Expt. Stat., Bull. 325. 



