PLATE IV. FUSARIA OF POTATOES 



Figs. 1 and 2. Fusarium culmorum var. leteius, from above and below 

 Fig. 3. F. subpallidura var. roseum, from above; on slight!}^ acidified medium 

 F. discolor, from below 

 and 6. F. discolor var. triseptatum: 5, from above, in dark on neutral medium; 



6, from above, in light on slightly acidified medium 

 F. caudatum var. Solani, from above, neutral medium 

 F. trichothecioides, from above 

 F. culmorum from above, on hard oat agar 



F. culmorum var. leteius, from above, on hard oat agar 



F. discolor var. sulphureum, from above 



F. lucidum, from above, slightly acidified medium, fifteen days old 



fig- 



4. 



Figs 



. 5 



Fig. 



7. 



Fig. 



8. 



Fig. 



9. 



Fig. 



10. 



Fig. 



11. 



Fig. 



12. 



