SMALL CATERPILLARS INJURING THE LEAVES 



279 



Fig. 402.— Cocoon of the Applc-luut Buccukitrix. Enlarged and natural size. 



Original. 



In the fall the larvjB migrate to twigs or branches and make 

 small, wliitish, ribbed cocoons, often somewhat conspicuous when 

 occurring in large numbers. 

 The tiny parent moth emerges 

 from the cocoon the following 

 spring. 



The use of Paris green or arse- 

 nate of lead to poison the cater- 

 pillars when they begin feeding 

 on the surface of the leaf is the 

 easiest remedy, although a win- 

 ter spraying with lime sulphur 

 or 15 per cent kerosene emulsion 

 will be likely to kill the overwin- 

 tering form. The species is 

 seldom a genuine pest. 



Fig. 403. — Adult of the Apple-leaf 

 Bucculatrix. Enlarged and natural 

 size. Original. 



The Spring Canker-worm {Paleacrita vernata Peck) 

 A small, naked measuring worm or inchworm attacks the foliage of 

 apple trees in early spring. At first small holes are eaten in the leaves, 



