Bui. 1 1 6, Part I, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate I. 



Fig. 1.— Rod and Single Cyclone Nozzle Used to Apply Spray to Underside of 

 Grape Foliage. Power Supplied by Tractor Sprayer. Vineyard of Mr. H. H. 

 Harper, North East, Pa. (Original.) 



Fig. 2.— Rod Carrying Two Cyclone Nozzles Used to Apply Spray to Underside 

 of Grape Foliage. Power Supplied by Compressed Air. Vineyard of Mr. 

 A. I. Loop, North East, Pa. (Original.) 



SPRAYING AGAINST THE GRAPE LEAFHOPPER. 



