K. .T. F. SHAAV. 



133 



Experimoit XI. — Rhizucfonia of cotton on cow pea — 



Date of 



so will". 



No. of D..t,-of 



plants in pot. infection. 



Woundr.l and 



inffi'teil 



10-S-ll 



Sclerotia were not formed so abundantly on diseased plants as in 

 other cases. The stems became reddish bi'own and soft at the point 

 of attack, hyphse were numerous running in all directions through 

 the cells. Infections were made both at the growing point and on 

 the hypocotvl : in one of the former sclerotia wei'e formed (PI. IV, 

 Fig. 2). 



Experiment. XII. — Rhizoctonia of cotton on ground nnt (small 



Japan) — 



In Pot V the plants developed Rhizoctonia at the apex and not 

 at the base, where they had been infected. In three of the plants 

 in Pot 6 the Rhizoctonia was developed at the place of infection, the 

 wliole of the hypocotyl becoming rotted with abundant formation 



