18 E BE HEART 8 OUTLINES OF 



The best remedy is keeping down such weeds and grass 

 as the eggs are liable to be deposited on. 

 The larvae are preyed upon by a parasite. 



THE CANKER WORM. 



(Anisopteryx vernata.) 



The Spring Canker Worm hibernates as a pupa, a short 

 distance below the surface of the earth. 



Some emerge from October on, if the winter is a mild 

 one The remainder generally do so about the middle of 



Fig. 13. Fig. 14. 



Male and Female Canker Worm Moths. 



March, the females appearing first. These females are 

 wingless. They crawl up the tree and deposit their eggs in 

 irregular masses of fifty to one hundred between branches, 

 under scales of bark, or in any other sheltered situation. 



These eggs are of a broad oval form. They hatch in a 

 few days, about the time the apple trees are leafing out, and 

 immediately attack the leaves, puncturing them with small 

 holes. They soon strip the trees of most of their leaves, 

 and will kill them in two or three seasons. 



The color of the larva is a dark olive-green or brown, 

 much resembling the general color of the tree. They fasten 

 themselves by their two pairs of posterior or pro-legs to a 

 twig, and hold the body away from the tree so that they re- 

 semble a short f pine or branch. This is a protective device. 



When alarmed they drop by a slender silken thread a 



