Bui. 116, Part I, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate III. 



Fig. 1.— Gasoline-Engine Sprayer Supplying Power for Two "Trailer" Leads of 

 Hose, in Spraying Against the Grape Leafhopper. Vineyard of Mr. J. E. Beatty, 

 North East Pa. (Original.) 



Bias 



Pig. 2.— Gasoline-Engine Sprayer Supplying Power for Two "Trailer" Leads of 

 Hose in Spraying Against the Grape Leafhopper. Vineyard of the Peacock- 

 Rood Company, Westfield, N. Y. (Original.) 



SPRAYING AGAINST THE GRAPE LEAFHOPPER. 



