Bui. 866, U. S. Dept. of Agriculture. 
Plate 
* 
» 
Fig. I. — Potato Vines Sprayed with Bordeaux, 3-3-50 (Plat 55), and 
Unsprayed (Plat 54). 
Fig. 2— Potato Vines Sprayed with Pickering Spray (Left of Stake 43) and 
Unsprayed Vines (Right of Stake 43). 
