Fusaria of Potatoes 185 



Hab. In tuberibus putridis Solani tuberosi una cum F. Solani et F. 

 oxysporo, New York, Amer. bor. 



Measurements of conidia on different media are as follows: 



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

 from pseudopionnotes : 

 Conidia: 0-septate, 2 per cent 



1-septate, 10.5 per cent, 19 x 3.5/x 



2-septate, 5.5 per cent, 28 x 3.7/z 



3-septate, 37 per cent, 32.5 x 4.2 (24-50 x 3.9-4.7) At 



4-septate, 6 per cent, 45 x 4.2a* 



5-septate, 33 per cent, 48x4.5 (40-62 x 3.9 5.3) ai 



6- to 10-septate, 6 per cent, 50-90 x 5-6. 1a* 



On hard potato agar, culture eighty-six days old; conidia from a small 

 sporodochium , semi-dry : 

 Conidia: 3-septate, nearly 100 per cent, 29.5 x 3.4 (20-41 x 3-4) ai 



On red raspberry cane plug, culture fifty-two days old: 



(1) Conidia of sporotrichial form 



Conidia: 0-septate, 97 per cent, 9.5 x 6.5 (7-12 x 4-7.5) ai 

 1-septate, 3 per cent, 13.5 x 5.2 (10-15 x 4.8-6) /x 

 2-septate, rare 

 3-septate, exceptional, one measured, 21 x 5.2a* 



(2) Conidia of sickle-shaped form 



Conidia: 0-septate, 35 per cent, 11 x 2.9 (10-13 x 2.5-3. 1)m 

 1-septate, 60 per cent, 15.5 x 3.2 (12-22 x 2.9-3.5) At 

 2-septate, very rare 

 3-septate, 5 per cent, 25 x 3.5 (20-28 x 3-4) /z 



On hard lima-bean agar with 2 per cent glucose, culture 10 days old; 



conidia from a pseudopionnotes: 



Conidia: 0-septate, 5 per cent, 10 x 3 (5.2-16 x 2.1-3.7V 

 1-septate, 15 per cent, 22 x 3.3 (16-28 x 3-3.5) At 

 2-septate, 2 per cent 



3-septate, 22 per cent, 33 x 3.8 (27^9 x 3.5^.8) At 

 4-septate, 23 per cent, 45 x 4 (38^9 x 3.9-4. IV 

 5-septate, 30 per cent, 51 x 4.1 (41-62 x 3.5-4.7) tt 



