INSECTS INFESTING THE APPLE TREE. 



93 



CHAPTER XLI. 



The Apple Leaf Grumpier. 



(Phycita nebulu. — Walsh. ) 



Synonym. — Acrobasis nebula. 



Order, Lepidoptera ; Family, Pyralid^. 



Living in a curved, black, silken tube (Fig. 68a), on apple 

 and plum trees, a reddish-brown worm, having a roughened 

 head. (Fig. 68c.) 



Fig. 68. — A p p 1 e Leaf 

 Grumpier ; c, the head and 

 fore part of the caterpillar's 

 body enlarged — color, 

 brown; d, the moth, en- 

 larged — colors, gray and 

 brown ; a, a case in Avhich 

 the caterpillar lives, with 

 the fore part of the latter's 

 body protruding 'from the 

 opening in the larger end ; 

 h, several cases fastened 

 together — color, black. 



When fully'iiligrown this 

 worm measures nearly six 

 lines in length ; it then 

 closes the opening of the 

 silken tube in which it lives, and soon afterward assumes the 

 pupa form. The moth (Fig. 68c^,) issues during'the Summer 

 season, and the worms or larvse which are produced from the 

 eggs she deposits pass the AVinter inside of their silken tubes 

 (Fig. 686), there being but one brood jDroduced in one year. 

 It has the habit of fastening dead leaves to the outside of its 

 case, which makes its presence very conspicuous during the 

 Winter season. In order to lessen the ravages of this insect, 

 it is only necessary to collect the silken tubes containing the 

 larvae and burn them. This can best be accomplished in the 

 Winter season after the leaves have fallen from the trees, at 

 which time the cases of this insect may be readily discovered. 



