150 C. D. Sherbakoff 



Differs from F. subulatum Ap. et Wr. mainly in shorter conidia, absence 

 of carmine color in substratum, and high, better-developed, aerial 

 mycelium. 39 



The measurements of the conidia on various media are as follows: 

 On red raspberry cane plug, culture thirty-one days old: 

 Conidia: 3-septate, 35 per cent, 40 x 2.7 (29-49 x 2.3-3.3) /* 

 4-septate, 20 per cent, 51 x 3 (45-53 x 2.3-3.4)/* 

 5-septate, 45 per cent, 55 x 3.1 (48-60 x 2.9-3.8)/* 

 On potato tuber plug, culture ninety-nine days old (in general, spores 

 more or less deteriorated): 

 Conidia: 1-septate, 1 per cent 



3-septate, 33 per cent, 30 x 3.6 (21-42 x 3-4) /* 

 4-septate, 20 per cent, 36 x 3.9 (33-42 x 3.5-4.1)/* 

 5-septate, 46 per cent, 41 x 4 (35-48 x 3.5-4.1)/* 

 6-septate, rare, 43 x 4.1/* (only one measured) 

 On potato stem plug, culture one hundred and thirteen days old: 

 Conidia: 3-septate, 67 per cent, 34 x 3 (28-49 x 2.9-3.6)/* 

 4-septate, 20 per cent, 42 x 3.3 (37-48 x 3-3.8)/* 

 5-septate, 13 per cent, 44.6 x 3.4 (38-47 x 3-3.8)/* 

 On whole steamed potato tuber, culture thirty-eight days old: 

 Conidia: 3-septate, 25 per cent, 37 x 3.8 (31-42 x 3.5-4) ju 

 4-septate, 35 per cent, 43 x 4 (36-49 x 3.5-9.2)/* 

 5-septate, 40 per cent, 47 x 4.1 (40-56 x 3.5-4.4)/* 

 6-septate, few, 52 x 4.4 (only a few measured) 

 On rye grain, culture sixty-five days old: 

 Conidia: 3-septate, 16 per cent, 42 x 4 (36-49 x 3.5-4.3)/* 

 4-septate, 17 per cent, 45 x 4.1 (36-54 x 3.5-4.3)/* 

 5-septate, 67 per cent, 51 x 4.2 (43-58 x 3.7-4.7)/* 

 On hard lima-bean agar, culture ten days old: 

 Conidia: 0-septate, very rare 

 1-septate, very rare 

 2-septate, very rare 



3-septate, 24 per cent, 41 x 3.3 (36-48 x 3-3.5)/* 

 4-septate, 20 per cent 

 5-septate, 56 per cent, 52 x 3.9 (42-59 x 3.2-4.1)/* 



35 This grows straight up and out from the point of inoculation in a plate culture on potato agar in the 

 first week of its growth, while the aerial mycelium in F subulatum is always of a more or less loose, feltlike 

 character, uniformly medium short over the surface of the colony. 



