210 



Nature-Study Agriculture 



Two 



imported 



pests 



in their webs, and the 

 other is to search for 

 the egg masses in 

 winter when the trees 

 are bare. The pupils 

 of one school in Massa- 

 chusetts undertook the 

 work of protecting the 

 apple trees in the 

 neighborhood. They 

 went through the or- 

 chards in winter time 

 and picked off the 

 twigs on which there 

 were egg masses. This 

 saved the fruit of the 

 following summer. 



The gypsy moth and 

 the brown-tail moth 

 may be spoken of to- 

 gether, for they are 

 similar in some re- 

 spects. Both were in- 

 troduced into the New 

 England States from 

 Europe and both de- 

 stroy the foliage of fruit and forest trees. A naturalist 

 brought the gypsy moth from France. Some of them 

 escaped from him, and within twenty years they had 

 so multiplied that they were killing all the trees in 

 localities where they were especially numerous. Some- 



u. s. D. A. 



FIG. 163. Nest and larvae of apple-tree tent 

 caterpillar in fork of wild cherry. There are 

 a number of kinds of tent caterpillars, but 

 this one is the commonest and the most de- 

 structive. 



