150 FRUIT CULTURE. 



kerosene. Covering the vines with mosquito 

 netting has been resorted to in many places. 

 Whale-oil suds have no appreciable effect upon 

 the bug. Kerosene will kill it, but whether it 

 can be used with sufficient strength to be ef- 

 fectual, without injury to the vine, is yet to be 

 proved. Paris-green should also be tried. 



The Leaf-Hopper or Thrip is often a trouble- 

 some little insect about one eighth of an inch 

 long, wingless in its early stage, but acquiring 

 wings as it matures and becomes able to fly from 

 vine to vine. It feeds upon the under side of 

 the leaves, especially those of delicate foliage 

 like the Delaware, and often increases to such 

 numbers as to do serious injury. In glass houses 

 it is easy to destroy them by fumigating with 

 tobacco when they are young. As they mature 

 they are much tougher. Syringing with tobacco 

 water, hellebore, and other decoctions, in early 

 summer, is serviceable. Carrying lighted torches 

 through the vineyard and at the same time 

 rustling the foliage will attract and burn the 

 mature winged hopper. It is much easier to 

 destroy them when they are young and delicate. 



Root borers are troublesome in some sections, 

 especially the Grape Root Borer (^ffigeria polisti- 

 formis), in North Carolina and in the Middle 

 and Western States. A mound of earth or a 



