Fusaria of Potatoes 253 



Average of the above measurements: 

 Conidia: 0-septate, 5 per cent, 8.7 x 4fx 



1-septate, 11 per cent, 17 x 4.3ju 

 2-septate, 6 per cent, 22.5 x 4.6^ 

 3-septate, 76.5 per cent, 29.75 x 5.5/x 

 4-septate, 1.5 per cent, 35.5 x 5.85/i 

 5-septate, rare, 44.3 x 5.8^ 



57. Fusarium Solani (Mart. p. par.) Ap. et Wr. var. cyanum n. var. 

 (Fig. 45, h to j) 



Differs from F. Solani mainly by having macroconidia typically more 

 rounded at apex and base, by fewer 4-septate and absence of 5-septate 

 conidia, and by frequent occurrence of bluish plectenchyma (on hard bean 

 agar and potato. tuber plugs); sometimes distinct blue color in conidia also 

 observable; size for the same septation type of conidia almost the same 

 as that of F. Solani. 



Hab. Same as for F. Solani, but much less common. 



On potato tuber plug, culture sixty-eight days old; conidia from a 

 sporodochium : 

 Conidia: 0-septate, 28 per cent 



1-septate, 22 per cent 



2-septate, 35 per cent 



3-septate, 15 per cent, 28 x 5.2 (24-31 x 4.8-5.7) \i 



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



from pseudopionnotes: 



Conidia: 0-septate, 14 per cent, 12 x 3.7 (8.7-14 x 2.5-5) y. 



1-septate, 22 per cent, 24.5 x 4.5 (15-30 x 3.5-5.3)/x 

 2-septate, 19 per cent, 29 x 5 (24-32 x 4.8-5.3)^ 

 3-septate, 45 per cent, 33 x 5.7 (31-35 x 5-6) y 



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



a sporodochium : 



Conidia: 0-septate, few 



1-septate, 3 per cent 



2-septate, 5 per cent, 25 x 5.5 (19-27 x 4.7-5.8) m 

 3-septate, 90 per cent, 30 x 5.7 (28-35 x 5.2-5.9) M 

 4-septatc, 2 per cent, 35 x 5.5 (33-37 x 5.2-5.7) m 



