246 C. D. Sherbakoff 



Hab. On rotted tubers of Solanum tuberosum and on other plants, in 

 the United States and in Europe. The organism was isolated by the 

 writer from specimens received from various States. 



Measurements of conidia on different media are as follows: 



On potato tuber plug, culture seventy days old; conidia from pseudo- 



pionnotes : 



Conidia: 0-septate, rare 



1-septate, 3 per cent 



2-septate, rare 



3-septate, 60 per cent, 46 x 5.3 (38-51 x 5.2-5.7) ju 



4-septate, 30 per cent, 50 x 5.4 (43-54 x, 5.2-5.9) /x 



5-septate, 7 per cent, 52x5.6 (45-54 x 5.2-5.9) ju 



On slightly acidified hard potato agar, culture eleven days old; conidia 



from thin pseudopionnotes : 



Conidia: 0-septate, 2 per cent, llx4/x 

 1-septate, 2 per cent, 20 x 4.5)Lt 

 2-septate, rare 



3-septate, 23 per cent, 43.5 x 5.2 (33-51 x 4.6-5.3) /x 

 4-septate, 68 per cent, 49 x 5.6 (42-65 x 4.6-6.7) ju 

 5-septate, 5 per cent, 60x5.85 (56-63 x 5.6-6.45) ^ 



On red raspberry cane plug, culture eighty-two days old; conidia from a 



sporodochium : 



Conidia: 1- and 2-septate, rare 



3-septate, 57 per cent, 44 x 5.1 (29-50 x 4.3-5.9) /x 

 4-septate, 43 per cent, 51 x 5.3 (40-54 x 4.7-5.9)^ 

 5-septate, rare, 54 x 5.4/z (only one measured) 



On potato tuber plug, culture sixty-four days old; conidia from thick 



pseudopionnotes : 



Conidia: 0-septate, rare, about 9 x 3.5^ 



3-septate, 55 per cent, 43 x 4.9 (28-50 x 4.7-5. 1)m 

 4-septate, 45 per cent, 48 x 4.9 (43-55 x 4.7-5.7)/i 

 5-septate, very rare 



