SMALL CATERPILLARS EATING THE LEAF SURFACE 277 



When the caterpillars are feeding together, the simplest means of 

 control is to remove the leaves on which they are at work. Later, 

 when the larvae have scattered, it is necessary to apply arsenate of 

 lead or Paris green. If grapes are sprayed early with arsenicals, 

 enough of the poison will adhere to check these insects when they begin 

 feeding. 



The Apple-leaf Skeletonizer {Canarsia hammondi Riley) 



A small, brown caterpillar, not more than half an inch long when 

 full grown, injures apple foliage by eating the surface of the leaves. 



Fk 



397. — Work of the Apple-leaf Skele- 

 tonizer. Original. 



erpillar is marked by four black dots 

 the first segment and two 

 on the second. 



The pupal stage is passed 

 on the leaf. The adult is 

 a grayish moth, expanding 

 half an inch. There are two 

 or three broods in a season. 



The application of arse- 

 nate of lead or Paris green 

 to the foliage \\\\\ soon check tonize 

 the pest. It is necessary to inal. 



Fig. 398. — Larva of the Apple-leai 

 Skeletonizer. Enlarged. Original. 



It begins work near the center 

 of the leaf, and spins over itself 

 a thin web. Frequently sev- 

 eral of the worms will be found 

 under a single web. The cat- 

 just back of the head, two on 



'mm 



9.— Adult of the Apple-Leaf Skele- 

 r. Enlarged and natural size. Orig- 



