Bui. 64, U. S. Dept. of Agriculture. 



Plate II. 



Fig. 1.— Stem-End Browning of Potatoes Due to Fusarium Oxysporum. Tubers 

 FROM Wilted Plants, Burbank Variety, Middle River, Cal. 



Fig. 2.— Net Necrosis of Potato, Showing Nonparasitic Internal Discoloration 



OF Tubers. 



