102 DISEASES OF THE SWEET PEA 



numerous sclerotia which are made up of 

 closely interwoven short barrel-shaped 

 hyphse (fig. 7^) . 



FIG. 7. a YOUNG hypJuB OF Rhizoctonia from sweet pea. 

 b BARREL-SHAPED hypha FROM scleroHa of the same 



FUNGUS. 



Rhizoctonia solani Kuhn produces only 

 micro or small sclerotia, whereas Corticium 

 vagum B. and C. produces macro or large 

 sclerotia. After repeated attempts the 

 Corticium or perfect stage of the sweet pea 

 Rhizoctonia could not be obtained in pure 

 culture. This accords with the findings of 



