Memoir 85 



Plate IV 



RESPONSE OF CABBAGE STRAIN AND OF THREE POTATO STRAINS OF CORTICIUM VAGUM TO A 



MEDIUM ADJUSTED TO pH 2.7 



C, Cabbage strain, petri dish completely covered but no sclerotia produced. P27, potato strain, petri 

 dish completely covered, with a few sclerotia scattered on surface. P70, Potato strain, petri dish not 

 covered, except for an area of 2.6 centimeters in diameter which is completely covered with sclerotia. 

 P13, Potato strain, petri dish completely covered, with a few sclerotia in center 



