'230 



THE GIPSY MOTH IN NEW HAMPSHIRE. 



Cost of Spraying average orchard trees, from 20 to 25 



cents per tree. Cost of spraying average street trees, from 



40 to 50 cents per tree. Cost of bnrlapping and attending, 



about 20 to 25 cents per tree for the season of from six to 



eight weeks. Cost of banding the trees with Tanglefoot or 



similar substance, 5 to 10 cents per tree ; and an additional 



cost for patrolling to kill the caterpillars. Cutting the 



brush and poor trees, pruning and treating egg-clusters 



varies in cost very widely according to the growth, and 



amounts all the way from $10 to $100 per acre. An 



average native growth of from twenty-five to thirty years 



around Boston can be cut and put into cordwood for about 



$40 per acre, and the ground may be burned over with the 



brush after the wood has been removed for from $2 to $5 



per acre. 



L. 0. Howard. 



Fig. 8.— Killing the eggs of the Gipsy Moth in woodland, showing the large amount 

 of labor and expense involved in combating the pest in badlj' infected districts. 

 (After Forbush and Fernald.) 



