132 MORPHOI.OriY AND PARASITISM (IK RIIIZOrTONl A. 



EjlH-iimrut /A'.- -Infi'ction of lihhortonia of \\\\v on <»roiiiul nut- 



In the case of the phmts in Pot 3 it is very probable that the 

 deaths were due to infeotod seed. All tlie diseased plants developed 

 R/iizoctoitia in the root at the seat of infection, but one also showed a 

 copious growth of Rhizoctonia at the apex wliere there had been no 

 infection : the intermediate portion of rhc stem was (iiiite healthy 

 and did not contain any hypha". in Pot 4 only one plant develojH'd 

 Rliizortonia at the seat of infection, the other two plants developed 

 it at the apex, in the control pots two of the deatlis in Pot 5 were 

 due to the development of R/iiznrtonia at the apex, and one to an 

 attack at the base of the hypocotyl ; the death in Pot 6 was also 

 due to an attack at the base of the hypocotyl. 



H.rprrimeiil X. — Rliizoctoxia of cotton on jute 



Dftt<-of 

 sowin){. 



No. of 

 plant-' in pol. 



Date of 

 infection. 



25-7-11 



Control. 



from 

 after 



Deaths look pl»< 



2 to 7 day 



infection. 

 Iiiiiihation of diseased 



plant nn*'<' Hhizoclonin. 



