FIG. 7. FUSARIUM WILT. 



a Early stage of Fusarium wilt of sweet potato, b. sweet potato hill killed 

 by Fusarium wilt, c. spores of Fusarium batatatis, d. spores of Fusarium hyper* 

 oxysporum, e. chlamydospores of Fusarium (c. and d. after Harter). 



