148 



C. D. Sherbakoff 



and proved to be identical. The writer's measurements of conidia of 

 the original strain are as follows: 



On red raspberry cane plug, culture twenty-seven days old : 

 Conidia: 3-septate, 10 per cent, 55 x 2.9/* 



4-septate, 20 per cent, 60.4 x 3 (54-76 x 2.6-3.5) m 

 5-septate, 70 per cent, 65x3.4 (57-76 x 2.6-4.1 )/x 



On potato tuber plug, culture ninety-nine days old: 

 Conidia: 0- to 2-septate, none to very few 



3-septate, 35 per cent, 33 x 3.7 (27-40 x 3-4) n 

 4-septate, 20 per cent, 38 x 3.7 (32-42 x 3-4.1 ) M 

 5-septate, 45 per cent, 48 x 3.85 (42-58 x 3.5-4.1)/* 

 6-septate, rare, 57 x 4ju (only one measured) 



Fig. 12. — a-f, Fusarium subulatum var. brevius: a, Conidia, b, conidiophorc, from small 

 sporodochium of 31-days-old culture on red raspberry cane plug; c, sporodochial conidia from 

 113-days-old culture on potato stem plug; d, pseudopionnotal conidia from 38-days-old culture 

 on whole steamed potato tuber; e, sporodochial conidia from 65-days-old culture on rye straw; 

 f, aerial conidia from 10-days-old culture on hard lima-bean agar. 



g-j, F. subulatum: G, Sporodochial conidia from 31-days-old culture on red raspberry cane 

 plug; h, semi-dry conidia from sporodochium of 38-days-old culture on steamed potato tuber'; 

 i, sporodochial conidia from 113-days-old culture on potato stem plug; J, sporodochial conidia 

 from 65-days-old culture on rye grain 



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

 Conidia: 3-septate, 5 per cent, about 35 x 3/j (only a few measured) 

 4-septate, 4 per cent 

 5-septate, 91 per cent, 54 x 3.6 (47-65 x 3.2-3.9) n 



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

 Conidia: 3-septate, 3 per cent, about 40 x 3.5/x. 

 4-septate, 8 per cent, about 48 x 3.6^ 

 5-septate, 89 per cent, 55 x 3.7 (37-63 x 3.5-3.9V 

 6-septate, few, same measurement as 5-septate 



