FusARiA OF Potatoes 217 



On hard lima-bean agar with 2 per cent glucose, culture thirteen days 

 old; conidia from aerial mycelium: 



Conidia: O-septate, 90 per cent, 9.5 x 2.25 (7-15.5 x 1. 75-2.4) ^ 

 1-septate, 10 per cent, 13.4 x 2.5 (12-18 x 2.3-3) m 



On corn meal agar, culture one hundred and seventy-three days old : 

 Chlamydospores : O-septate, in mycelium, 8.5 x 8.2 (7-11.5 x 5-10.5) )U 



On hard lima-bean agar, culture six days old; conidia from a sporo- 



dochium : 



Conidia: O-septate, rare 



1-septate, very rare 



3-septate, up to 100 per cent, 37 x 4.3 (31-41 x 3.9-4.4) m 



4-septate, rare, 37 x 4.4/i (only one measured) 



On same medium as above, culture fifty-one days old; conidia from a 



medium-sized sporodochium : 



Conidia: O-septate, 1 per cent 

 1-septate, 1.5 per cent 



3-septate, 73 per cent, 33 x 4.5 (23-39 x 3.5-4.8) /z 

 4-septate, 23 per cent, 37 x 4.5 (31-42 x 4-4.8)m 

 5-septate, 1.5 per cent, 38 x 4.6 (31^2 x 4.2-4.9)m 



On same medium as above, culture twelve days old; conidia from 



pseudopionnotes : 



Conidia: O-septate, 6 per cent 

 1-septate, 3 per cent 

 2-septate, exceptional 



3-septate, 74 per cent, 35 x 4.6 [(22-) 33-39 x (3.5-) 4.1-4.8]^ 

 4-septate, 16 per cent, 36 x 4.7 (33-42 x 4.4-4.8) m 

 5-septate, 1 per cent, 37 x 4.7 (35-40 x 4.6-4.8) yu 



On potato tuber plug, culture fourteen days old ; conidia from a medium- 

 sized sporodochium : 

 Conidia: O-septate, 8 per cent 

 1-septate, 3 per cent 

 2-septate, rare 



3-septate, 46 per cent, 35 x 4.1 (29-43 x 3-4.7) m 

 4-septate, 29 per cent, 40 x 4.2 (31-47 x 3.5-4.7)m 

 5-septate, 14 per cent, 40 x 4.3 (35-47 x 4-4.7)// 



