Bui. 89, Bureau of Entomology, U. S. Dept. of AgiicultL 



Plate VII. 



Fig. 1.— Kotanled yrowth of vines in the unsprayod plat. (Ori^^inal.) 



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Fig. 2.— Vigorou.s growth of vinos in the sprayed phit. (^Original.) 



Views of Experimental Plats in Mr. Roscoe Davidson's Vineyard at North 



East, Pa. 



