432 ECONOMIC ZOOLOGY AND ENTOMOLOGY 



The best method of control is to gather the eggs during the 

 winter and destroy them. The larvae seem to be very resistant 

 to poisons, and when the arsenical sprays are used it is necessary 

 to make them very strong. 



Climbing Cut-worms. Several species of smooth-bodied 

 cut-worms often climb the trees, eating the foliage or destroying 

 the young fruit. Sometimes these cut-worms go in great 



FIG. 205. Green-fruit worms, Xylina grotei, at left, and Xylina anten- 

 nata, at right. (Natural size; after Slingerland.) 



bands or armies traveling across the country and destroying all 

 the vegetation in their path. The adults, which are moths that 

 usually fly only at night, are mostly grayish or brownish, and 

 are often called owlet-moths on account of the peculiar appear- 

 ance of the eyes and head. 



About the only successful method of combating cut-worms 

 after they have once gained foothold on the trees is to jar 

 them off and destroy them. Fortunately they are attacked by 

 several natural enemies which generally keep them in control. 



The Bud -moth (Tmetocera ocellana). Often the unfolding 

 leaves of fruit trees are tied together with silken webs making 



