32 



FRUIT INSECTS 



Fig. 33. — FuU-growi) apple maggot, side view ( X 7). 



Canada. While summer and early fall varieties are particularly 

 subject to attack, winter apples are also sometimes badly in- 

 fested. Sweet and 

 subacid varieties are 

 most susceptible, but 

 such acid varieties as 

 Greening, Baldwin 

 and Oldenburg are 

 sometimes attacked. 

 In the Lake Cham- 

 plain region the Fameuse is very subject to injury, and in 

 western New York and Canada crab apples are sometimes 

 badly infested. 



The inj ury is caused 

 by a whitish maggot, 

 J inch or more in 

 length, which bur- 

 rows in all directions 

 through the fruit 

 (Figs. 33 and 34). 

 In the Northern states, the parent flies appear in early July 

 and continue abundant well into September. The females do 



not begin egg-laying till 

 two or three weeks after 

 emergence. During this 

 time they may be seen 

 resting on the leaves or 

 fruit and lapping up 

 drops of moisture, or 

 licking the surface of the 

 waxy covering of the 



Fig. 35. — Apple maggot fly (x 4f). fj.^^^ ^^j^h their fleshy 



proboscis. They are blackish, two-winged flies with the head and 

 legs yellowish ; the abdomen has three or four transverse white 



Fig. 34. — Full-grown apple maggot, ventral view. 



