F. J. F. SHAW. 



139 



tubers at Bankipore is morphologically indistinguishable from that 

 which has just been described on jute, cotton, ground nut and cow 

 pea. Under these circumstances it seems better to identify the 

 Rhizoctonia which attacks these four crops as R. Solanl Kiihn than 

 either as R. Medlcaginis D. C, or the rather indefinite R. violaceai 

 Tul. It may be noted here that Eriksson refers to the Rhizoctonia 

 on carrot as R. violacea, and in his figures the sclerotia appear as 

 small black dots like those on the cow pea (PI. II, Fig. 3) ; R. Medi- 

 caginis is, however, described as attacking the carrot and Eriksson's 

 fungus was probably this. It is impossible to tell from the descrip- 

 tion of Cunningham (7) whether the sclerotial fungus which he des- 

 cribes as attacking lucerne in India was R. Solani or R. Medicaginis. 



CORTICIUM VAGUM B. & C. 



In October and November 1910, and also in 1911, a form of 

 Rhizoctonia which differed considerably from the above was found 

 attacking the ground nut and cow pea. Diseased plants were brown 

 and withered at the infected spots, and usually bore several sclero- 

 tia, which were much larger than the sclerotia of R. Solani, the size 

 varying from 1-5 mm. (PI. V, Figs. 1, 2). 





Text Fig, IV Corticium Vagum B. & C. ■ 250. 



