

* 





fc&s. 





a 





Fig. 7. Fusarium Wilt. 



a Early stage of Fusarium wilt of sweet potato, 6. 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). 



