FIG. 25. SWEET POTATO DISEASES. 



a. Slime mold (Fuligo violaced), b. slime mold (Physarum plumbeum), c. pox or 

 pit, d. formation of a cyst and liberation of spores of Cystospora batata (after Elliot), 

 e. white rust, /. oospore of the white rust fungus, g. soft rot, h. ring rot, i. fruiting 

 stalks of Rhizopus nigricans. 



