FusARiA OF Potatoes 225 



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



old; conidia from aerial mycelium: 



Conidia: 0-septate, 50 per cent, 8.6 x 2.5 (5.2-15 x 2.2-3) ^ 



1-septate, 10 per cent, 17.5 x 2.9 (12-21 x 2.3-3.5) m 

 2-septate, 0.5 per cent, 21 x 3.2ju (only three measured) 

 3-septate, 30 per cent, 35.6 x 4 (24-50 x 3.2-4.4) ^ 

 4-septate, 8 per cent, 45 x 4.2 (40-51 x 3.9-4.7) m 

 5-septate, 1.5 per cent, 47.5 x 4.3 (42-51 x 3.9-5.1)At 



On hard lima-bean agar, culture five days old; conidia from aerial 



mycelium: 



Conidia: 0-septate, 56 per cent, 11 x 2.4^t (only four measured) 

 1-septate, 4 per cent, 18 x 3.3jU (only four measured) 

 2-septate, 1.5 per cent 



3-septate, 37 per cent, 37 x 4 (26-47 x 3.8-4.4) jn 

 4-septate, 1 per cent, 43 x 4.3 (40-45 x 4-4.5) /z 

 5-septate, 0.5 per cent, 50 x 4.4/x (only three measured) 



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

 Chlamydospores : (1) 0-septate, in conidia, 8.4 x 6.8 (7-9 x 5-8) /x 



(2) 0-septate, terminal, on mycelium, 10 x 9 (9-10.5 

 X 7.5-10.5)m 



On potato stem plug, culture two hundred and two days old: 



(1) Conidia from aerial mycelium close to substratum 

 Conidia: 0-septate, 40 per cent 



1-septate, 20 per cent 

 2-septate, 10 per cent 

 3-septate, 30 per cent, 34.3 x 3.9 (22-42 x 3.4-4.1) /x 



(2) Chlamydospores, terminal and intercalary, in spores and mycelium 

 Chlamydospores: 0-septate, 8.9 x 6.8 (6.2-10 x 5.2-9) m 



On hard lima-bean agar, culture twelve days old; conidia from pseudo- 

 pionnotes : 

 Conidia: 0-septate, 2 per cent 



1-septate, 1 per cent 



2-septate, rare 



3-septate, 70 per cent, 44 x 4.3 (35-48 x 4-4.8) ju 



4-septate, 23 per cent 



5-septate, 4 per cent, 46 x 4.3 (40-53 x 4.1-5.2)/* 



