FusARiA OF Potatoes 211 



On red raspberry cane plug, culture sixty days old; conidia from a 



medium-sized sporodochium : 



Conidia: 0-septate, 25 per cent 

 1-septate, 5 per cent 

 2-septate, 1 per cent 



3-septate, 65 per cent, 38 x 4.2 (27-44 x 3.5-4.7)/x 

 4-septate, 4 per cent, 42 x 4.4 (36-49 x 3.7-4.7) ^ 

 5-septate, rare, about the size of 4-septate conidia 



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

 mycelium : 

 Conidia: 0-septate, 57 per cent, 8.5 x 2.8 (7-12 x 2.6-3.5) /x 



1-septate, 16 per cent, 14.5 x 3.25 (11-21 x 2.9-3.8) /x 



2-septate, 3.5 per cent 



3-septate, 23 per cent, 28 x 3.9 (23-37 x 3.5-4.4) /x 



4-septate, 0.5 per cent, 35 x 3.9 (30-37 x 3.5-4.4) /x 



On same media, culture twenty-two days old; conidia from small sporo- 



dochia : 



Conidia: 0-septate, 3 per cent 

 1-septate, 1 per cent 

 2-septate, rare 



3-septate, 84 per cent, 36 x 4 (29-40 x 3.9-4.4) ^x 

 4-septate, 10 per cent, 39 x 4.3 (33-42 x 3.9-4.7) /x 

 5-septate, 2 per cent, 41 x 4.2^^ (only a few measured) 



On hard potato agar, culture thirty-one days old: 



(1) Conidia from pseudopionnotes 



Conidia: 0-septate, 26 per cent, 7.4 x 2.7 (5.2-12 x2.6-3.5)m 



1-septate, 4 per cent, 13 x 3.3/x (only three measured) 

 2-septate, rare, 20 x 3.7/x (only three measured) 

 3-septate, 54 per cent, 35 x 4.2 (20-41 x 3.4-4.8) m 

 4-septate, 12 per cent, 40 x 4.4 (35-44 x 4-4.8) /x 

 5-septate, 4 per cent, 43 x 4.8 (41-46 x 4-4.8)^1 



(2) Chlamydospores (abundant) 



(a) Terminal, 0-septate, on mycehum, 8 x 6.6 (7-9 x 6-7) /x 



(b) Intercalary, in mycelium 



0-septate, 8.2 x 6.2 (6-9 x 4.5-8) m 

 1-septate, 11 x 5.7/x (only a few measured) 



(c) In conidia, 0-septate, 6.5 x 5.9^ 



