76 



INSECTS INJURIOUS TO THE APPLE 



likened to a beechnut. The insect lives by sucking the sap through 

 a sharp-pointed beak. 



Life History. Adults appear about the middle of May and 

 continue egg-laying through August and September. The eggs 

 are laid in two nearly parallel slits, each containing from six to 



Fia. 98. Woolly aphis on branch of young apple. 



twelve eggs. These slits run lengthwise of the branch and are 

 about three-sixteenths inch long, separated by about one-eighth 

 inch of bark (Fig. 96). This provision is important, as the tips of 

 the slits meet and cause a deadening of the wood, which prevents 

 the eggs being crushed. Cold weather kills the adults, but the 

 eggs winter in the branches, hatching in spring or early June. 



Control. Spraying specifically for this insect has not proved 

 effective, even against the young hoppers, since these infest vege- 



