APPLE INSECTS 41 



apple tree and go to the broad-leaved and narrow- 

 leaved plantains where the summer is spent; in the 

 fall the return migrants come back to the apple 

 where egg-laying females are produced and the 

 eggs are laid, thus completing the cycle. 

 Control — See the green apple aphid. 



The green apple aphid '^ (Aphis pomi-Apliis 



mail) 

 Order — Hemiptera 



The green apple aphid resembles the grain aphid 

 but is darker green and lacks the dark line down 

 the back ; it has not been recognized as seriously in- 

 jurious in this country until of comparatively re- 

 cent years; it is now considered the most injurious 

 species; it winters as eggs on the trees and spends 

 the whole year on the apple, not having alternate 

 food-plants like the two preceding- species; the 

 aphids curl the leaves, stunt the new growth and 

 often stunt and deform the apples. 



Control — The eggs of these aphids, although 

 there is some individual variation, those of the 

 grain aphid hatching earliest, hatch early in the 

 spring, about the time the flower buds begin to swell 

 and break and the leaves show green at the tips. 

 The young aphids cluster on the outside of the buds 

 where they are all exposed to contact with spray 

 material. Then is the time to kill them. Later 

 they get in between the leaves of the buds and in 

 rolled leaves and cannot be hit easily or not at all. 



The safest and most efficient material with which 

 to kill the aphids at this time is nicotine sulphate 

 alone, Y^ oi 2i pint to 100 gallons of water with 5 

 pounds of soap added, or combined with lime-sul- 



9 Parrott, Hodgkiss, and Lathrop — N. Y. State Expt. Stat., Bulls. 

 415 and 431. 



Hodgkiss— N. Y. State Expt. Stat., Bull. 461. 



