Fig. 7.— Htphae of the Potato Rhizoctonia from 

 Drawing by Mr. Sirrine. 



Fig. 6.— Rhizoctonia Fig. 5.— A Potato Tuber Showing the Sclerotia of the 

 sclerotia on a rhizoctonia. (% natural size.) 



Potato Stem. (Na- 

 tural Size.) 



