Cir 65, Bureau of Plant Industiy, U. 5. Dept. of Agriculture, 



Plate III. 



Average Bunches of Grapes, Showing the Proportion of Good and Rotten Berries 

 IN Four Plats in Mr. Tuttle'S Vineyard, near Paw Pav^, Mich. 



l-'ir,. ]. — Kuiicli lri)Mi j>l:it s siirayi'fi sovcn times witli amiiKiniacal copper ciirlmnate. Fig. 2. — Bunch 

 iruin Jilat '.) sprayed seven limes with neutral copper acetate. Fig. ;^.— Bunch from plat 10 sprayed 

 live times willi self-l)oiled lime-sulpliurand twice witli neutral copper acetate. Fli;. ■). — Bunch from 

 ]>lat 11 sprave<l five times w illi commeri'ial lime-sulphur and twice with neutral copper acetate. 



[Reduced to three-fourths natural size.] 



