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 larve have seattered, 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 inseets when they begin 
feeding. 
The Apple-leaf Skeletonizer (Canarsia hammond? Riley) 
A small, brown eaterpillar, not more than half an inch long when 
full grown, injures apple fohage by eating the surface of the leaves. 
ms” 
Fic. 398.— Larva of the Apple-leat 
Skeletonizer. Enlarged. Original. 
It begins work near the center 
of the leaf, and spins over itself 
! a thin web. Frequently sev- 
Fic. 397, — Work of the Apple-leaf Skele- eral of the worms will be found 
tonizer. Original. under a single web. The cat- 
erpillar is marked by four black dots just back of the head, two on 
the first segment and two 
on the second. 
The pupal stage is passed 
on the leaf. The adult is 
a grayish moth, expanding 
half anineh. There are two 
or three broods in a season. 
The appheation of arse- 
nate of lead or Paris green 
Fie. 399.— Adult of the Apple-Leaf Skele- 
tonizer. Enlarged and natural size. Orig- 
the pest. It is necessary to inal. 
to the foliage will soon check 
