FusARiA OP Potatoes 181 



On potato tuber plug, culture twenty-five days old; conidia from aerial 



mycelium : 



Conidia: 0-septate, rare, about 16x2.5^ 



1-septate, 7 per cent, 22 x 3.7^ (only three measured) 

 2-septate, 6 per cent, 27 x 4.1/i (only three measured) 

 3-septate, 40 per cent, 35 x 4.3 (29^5 x 3.8-4.8) m 

 4-septate, 28 per cent, 43 x 4.7 (35 x 49 x 4.1-5.2) /z, the broadest 



51 X 5.9m 

 5-septate, 19 per cent, 45 x 4.7 (40-53 x 4.3-4.9) m 

 6-septate, only one observed, 78 x 5.2^ 



On whole steamed potato tuber, culture forty-six days old: 



(1) Conidia from a medium large (2 millimeters in diameter) sporo- 

 dochium 



Conidia: 1-septate, 2.5 per cent, about 16 x 3^ 



2-septate, 2.5 per cent, about 28 x 3.5 (20-40 x 3.3-3.8))u 

 3-septate, 31 per cent, 38.5 x 3.7 (19-44 x 3-4.1)^ 

 4-septate, 34 per cent, 45 x 4^ (only three measured) 

 5-septate, 30 per cent, 48 x 4.15 (44-53 x 3.9-4.7)/i 

 6-septate, very rare, 61 x 4.3^ (only one measured) 



(2) Conidia from a small sporodochium 

 Conidia: 1-septate, 2 per cent 



2-septate, rare 



3-septate, 51 per cent, 40 x 3.9 (35-43 x 3-4.1)/z 

 4-septate, 24 per cent, 42 x 4.1 (36-50 x 3.5-4.8) /x 

 5-septate, 23 per cent, 46 x 4.2 (42-50 x 4-4.5) m 



On medium potato agar, culture eleven days old; conidia from 

 pseudopionnotes : 



Conidia: 3-septate, 13 per cent, 39 x 4.3 (28-48 x 3.5-4.8)^ 

 4-septate, 8 per cent 

 5-septate, 79 per cent, 48 x 4.6 (41-61 x 3.8-4.9)^ 



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

 (1) Conidia from aerial mycelium 

 Conidia: 0-septate, 6 per cent, 11 x 4.6 (6-18 x 4-5.3)// 



1-septate, 13 per cent, 18 x 5 (10-25 x 4. 1-5.5) /x 



