FusARiA OF Potatoes 207 



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

 from pseudopionnotes : 



Conidia: 2-septate, 0.5 per cent, 26 x 4.7/x 



3-septate, 93.5 per cent, 36 x 5 (26-49 x 4.3-5.8) /z 

 4-septate, 6 per cent, 41.6 x 5.3 (38-46 x 4.9-6. 1)m 

 5- and 6-septate, rare, 43-53 x 5-Q/jl 



On red raspberry cane plug, culture forty-eight days old; conidia from 

 a small sporodochium : 

 Conidia: 0-septate, 2 per cent 

 1-septate, 1 per cent 

 3-septate, 97 per cent, 35.6 x 5 (28-45 x 4-5.9) /z 



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

 pionnotes : 

 Conidia: 0-septate, 17 per cent, 10 x 3.6 (6-16 x 3-4,3)yu 



1-septate, 10 per cent, 20 x 3.9 (14-28 x 3.5-4.7) m 



2-septate, 3 per cent 



3-septate, 70 per cent, 34 x 4.9 (28-43 x 4.3-5.3) m 



4-septate, rare 



On potato tuber plug, culture ninety-nine days old ; conidia from a me- 

 dium small sporodochium: 

 Conidia: 2-septate, rare, 27 x 4.8/z 



3-septate, 100 per cent, 33.6 x 4.9 (29-39 x 4.6-5.7)/* 



On potato stem plug, culture one hundred and thirteen days old : 



(1) Chlamydospores, mostly unicellular 

 Chlamydospores: 0-septate, 6.5 x 6.1 (4.7-11 x 5.2-7. 5) fx 



(2) Conidia from a sporodochium 

 Conidia: 0- and 1-septate, very rare 



3-septate, 100 per cent, 34.5 x 4.5 (24-39 x 3.9-5.1)^ 

 4-septate, very rare, about the same size as 3-septate 



On whole steamed potato tuber, culture forty-nine days old; conidia 

 from a medium small sporodochium : 

 Conidia: 0- and 1-septate, rare 



3-septate, 100 per cent, 31 x 4.3 (29-36 x 4.1-4.8)/* 



I 



