SHADE TREE INSECTS 



29 



All enlarged. 



Green-Striped Maple Worm 



a. Female moth and antenna of male moth. 



b. Egg showing embryo within. 



c. Portion of egg ma.-JS. 



d. Mature caterpillar, side view. 



e. Mature caterpillar, top view. 



f. Pupa. 



Courtesy, Bur. Ent. and Plant Quarantine, U. S. Dept. Agr. 



Life History. About May or June, depending on the locality, the moths begin 

 to emerge from the overwintering cocoons. The eggs are deposited on the under 

 side of the leaves, one female being capable of laying as many as 150 eggs.' The 

 eggs hatch in about 8 or 10 days, and the young caterpillars begin to feed on the 

 leaves. In about a month, after molting four times, they become full grown, go 

 to the ground, and work their way into the leaf mold where they transform' to 

 pupae. In northern New England it is likely that only one generation occurs, 

 whereas farther south there may possibly be two. 



Control. The most effective means of control is spraying the foliage thoroughly 

 with lead arsenate, using 4 pounds of the powder to 100 gallons of water, with^!2 

 pounds of flour or 1 pound of calcium caseinate added to increase the adhesiveness 

 of the spray. This should be applied in Maj' or June when the caterpillars of the 

 first generation are young and easily killed. 



Bailey, H. L. Vt. Dept. .^gr. Bui. 35:26-27. No date. 



Felt, E. P. N. Y. State Mus. Mem. 8(2) :537-538. 1906. 



Houser, J. S. Ohio Agr. Exp. Sta. Bui. 332:252. 1918. 



Howard, L. O., and Chittenden, F. H. U. S. Dept. Agr. Bur. Ent. Circ. 110. 1909. 



McDaniel, E. I. Mich. Agr. Exp. Sta. Spec. Bui. 243:56. 1933. 



