APPLE INSECTS 43 



canker-worm is usually the common one in New 

 York. 



Control — Caterpillars quite resistant to poisons, 

 yet arsenate of lead, 6 to 10 pounds to 100 gallons 

 of water will control them; also hands of sticky 

 material, like tar, tang-lefoot or printers' ink to pre- 

 vent the females from climbing trees to lay eggs; 

 bands of fluffy cotton batting will serve; apply in 

 October for fall canker-worm and in early spring 

 for spring canker-worm ; also plow and cultivate in 

 August or September to destroy the pupc^e in the soil. 



The apple tent-caterpillar ^" (Malacosoma 



americana) 



Order — Lepidoptera. Manual, p. 360 



Passes winter as eggs laid in rings around 



branches; eggs hatch as buds begin to burst and 



larvae build tents in crotches of branches ; in 4 to 6 



weeks the caterpillars become grown and make 



dense cocoons in secluded places ; in about 2 weeks 



the moths appear and deposit eggs during last of 



June or first of July. 



Control — Collect and burn egg masses; school 

 children are often enlisted in the work of collecting 

 and destroying the egg masses; spray infested trees 

 with arsenate of lead 2j4 pounds to 50 gallons of 

 water just as the buds begin to open; repeat in a 

 week if necessary; destroy wild cherry and seedling 

 apple trees along the fence rows. Burn out with 

 gasoline torch. Cut out tents and burn. 



The forest tent-caterpillar ^^ (Malacosoma 

 dis stria) 

 Order — Lepidoptera. Manual, p. 362 

 Life history is similar to former species; larvae 

 do not build tent. 



12 Quaintance— U. S. Bu. Ent., Circ. 98. 



13 Slingerland— Cornell Univ. Expt. Stat., Bull. 170. 



