33 



Places of etitra tur of (he second generation. 

 UNSPRAYED TREES. 



SPRAYED TREES. 



n Average. 



The tables of the places of entrance of the first generation on 

 spraj^ed trees show some interesting facts, and it is to be deplored 

 that the records are not more extensive. 



No detinite data was secured in regard to what percentage of the 

 larvaB enter the sides where fruits are touching. In badly infested 

 orchards it is almost impossible to find such fruits into which a larva 

 has not entered. It would be safe to estimate that fully 50 per cent, 

 if not more, of the larvai entering at the sides emter where the fruits 

 touch. 



Immediately after entering the calyx cavity the larva tfikes its 

 first meal. We have a lack of data as to exactly what is eaten, but 

 most probably the larva acts as it does wh^^Utthe side is entered. After 

 spinning the web over the hole the larva, when it enters the side, eats 

 out a cavity under the skin and throws out but little castings. This 

 mine is eaten outward from the point of entrance, and in from 8 to 5 

 days the larva ))egins its tunnel toward the center of the fruit, reach- 

 ing that point when about one-quarter grown and about a week old. 



While at the surface, or while tunneling toward the center of the 

 apple, the larva pushes its excrement and frass through the entrance 

 hole. Later the entrance hole, especially at the calyx, is enlarged, 

 and a considerable amount of frass is thrown out, which characterizes 

 the infested fruit (PI. V, fig. 3). When a considerable cavity has been 

 made in the interior of the apple the excrement is bound together with 

 silk. Upon reaching the central portjou of the fruit the larva eats 

 651^1r— No. 41—03— 



