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



Plate II 



Fig. 1.— Showing Condition of Vine Injured by the Grape Leafhopper in the 

 Unsprayed Plat. Note Loss of Foliage, and also the Berries from the Clus- 

 ters. Vineyard of Mr. W. E. Gray, North East, Pa. (Original.) 





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Fig. 2.— Showing Condition of Vine in Plat Sprayed with Tobacco Extract No. 1, 

 Against the Grape Leafhopper. Note the Larger Size of the Berries in the 

 Clusters, Heavy Foliage and Stronger Cane Growth. Vineyard of Mr. W. E. 

 Gray, North East, Pa. (Original.) 



COMPARISON OF SPRAYED AND UNSPRAYED PLATS. 



