I 



SHADE TREES III 



Remedies — Spray trees as soon as caterpillars are 

 noticed, with arsenate of lead or some other arsenical 

 poison. Pick off egg cases in winter. 



The work of few insects is more universally known 

 than that of the Fall Web-worm. Late in summer 

 and early in autumn the conspicuous, unsightly webs 

 of this pest may be seen in nearly every orchard and 

 hedgerow over a large portion of the United States. 

 The adult is a pretty, white moth (c), which deposits 

 eggs on the leaves of various trees early in summer. 



Fail Web=worm 

 a, larva; ^, pupa; moth. (After Riley) 



These soon hatch into young caterpillars that begin 

 at once to spin a protective web. They feed upon the 

 parenchyma of the foliage, leaving the network of 

 veins, and grow quite rapidly, enlarging the web as 

 they develop. The full-grown larvae are a little more 

 than an inch long, with the body densely clothed with 

 yellowish hairs. They now leave their nests and 

 descend to the ground, where they spin slight silken 

 cocoons within which they change to pupae. 



Remedies — It is an easy matter to cut the webs 

 off and burn or crush the larvae. The pests may also 



