Cir. 65, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate I. 



Fig. 1.— -1, Two Bunches of Grape Blossoms from an Unsprayed Check Plat 

 IN Mr. Tuttle'S Vineyard, near Paw Paw, Mich., Almost Entirely Destroyed 

 BY Rot Before Blossoming. Ji, A Bunch of Sprayed Grapes from the Same 

 Vineyard Showing no Damage from Rot. 



[Natural .size.] 



Fig. 2.— .1, An Average Bunch of Grapes, Showing the Proportion of Rotten 

 Berries' <90. 7 Per Cent) in the Unsprayed Check Plat in the Tuttle 

 Vineyard. 7i, An Average Bunch of Grapes, Showing the Proportion of 

 Rotten Berries (4.3 Per Cent) in Plat 14 in the Same Vineyard. 



[Three-fourths natunil sizu.] 



