50 INSECTS OF ECONO^IIC IMPORTANCE 



rectly into the leaf and begin making their trumpet- 

 shaped mines in the leaves ; four generations in lat- 

 itude of A\'ashington, probably two here; larvae of 

 last generation pass winter in mines in fallen leaves 

 and pupate in spring. 



Control — Plow the leaves under or rake them 

 and burn; spray infested leaves during June with 

 nicotine sulphate, i pint to lOO gallons of water 

 with 4 pounds of soap added. 



Fall web-worm ^^ (Hyplianfria fcxfor) 

 Order — Lepidoptera. Manual, p. 321 



Eggs laid during June or July in clusters on 

 leaves; larv?e build web nests all over trees; they 

 pupate in September in flimsy cocoons hid away in 

 cracks and crevices ; in these the pup?e pass the win- 

 ter, the moths appearing in May or June; farther 

 south there are two broods. 



Control — Spray with arsenate of lead, 3 pounds 

 to 50 gallons of water as soon as the young cater- 

 pillars are seen ; collect cocoons during winter. 



The red-humped apple-worm -^ {Schiziira 



concinna) 



Order — Lepidoptera. Manual, p. 267 



Eggs laid in large white clusters on leaves in 

 June and July ; larvae feed in colonies on a branch ; 

 they go to the base of the tree and build parchment- 

 like cocoons in which they pass the winter; they 

 change to pupae in the spring; the moths emerge in 

 June, July and August. 



Control — Burn caterpillars with rag torch or 

 spray with arsenate of lead, 3 pounds to 50 gallons. 

 Make the first application early in July and second 

 about two weeks thereafter. 



26 Sanderson — New Hampshire Expt. Stat., Bull. 13Q. 

 ?7 Sanderson — New Hampshire Expt. Stat., Bull. 139. 



