Wire Stem of Cabbage 



11 



TABLE 3. Rate of Mycelial Growth of Cabbage, Bamboo, Aster, and' Six Potato 

 Strains, of Corticium vagum on Media Adjusted to Different pH Values 



* C 1920, original strain from cabbage seedling. 

 C 1923, original strain reisolated from lettuce seedling. 

 P 27, strain isolated from potato tuber, from Elba, New York. 

 P 49, strain isolated from potato tuber, source unknown. 

 P 13, strain isolated from potato tuber, from Mxine. 

 P 70, strain isolated from potato tuber, from college farms. 

 P 55, strain isolated from potato tuber, from college farms. 

 P 51, strain isolated from potato tubsr, from college farms. 

 B, strain causing a bamboo bud rot in Bermuda. 

 A, strain isolated from aster seedling in college greenhouse. 



The production of sclerotia in culture 



The strains of the fungus at a pH of 2 . 7 exhibited a variation in the rate 

 of formation of sclerotia as indicated in tables 4 and 5 and in Plate IV. 

 There had been no indications previously, when they were grown in test 

 tubes, that the several strains would produce sclerotia at a different rate; 

 but when this comparative study was made, entirely different responses 

 were noted in all three trials. The data in table 5 indicate the rate of 



