PLATE XV 
Fig. i, 2.—Potato tuber showing a soft-rot caused by Fusarium hyperoxysporum 
Wollenw. Field material from Mississippi. 
Fig. 3.—Potato tuber showing the type of rot produced by F. oxysporum in the 
experiments. Idaho Rural variety of potato inoculated with F. oxysporum 2999. 
Fig. 4, 5.—Potato tuber showing a dry-rot caused by F. radicicola , from high ground, 
Sonora, Cal. 
9838°—15 - 3 
