FusARiA OF Potatoes 153 



On red raspberry cane plug, culture seventy-six days old; conidia from 

 a sporodochium : 



Conidia: 3-septate, 35 per cent, 42 x 3.3 (32^8 x 2.7-4) ^ 

 4-septate, 15 per cent, 47 x 3.6 (42-53 x 3.2-4.3) m 

 5-septate, 50 per cent, 49 x 3.9 (38-58 x 3.2-4.4) m 

 6-septate, very rare 



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

 conidia from mycelium: 



Conidia: 1 -septate, 1 per cent 

 2-septate, 5 per cent 



3-septate, 19 per cent, 39 x 4.2 (28-50 x 3.9-4.8)^ 

 4-septate, 10 per cent 



5-septate, 60 per cent, 57 x 4.3 (52-72 x 4-5.3) jix 

 6-septate, 5 per cent, 62 x 4.7 (49-72 x 4.3-5.3)/* 

 7-septate, rare, 72 x 4.3^ (only one measured) 

 8-septate, exceptional, 87.5 x 5.8/x (only one measured) 



On potato tuber plug, culture twenty-four days old; conidia from a 



sporodochium : 



Conidia : 0-septate 



1-septate, 2 per cent 



2-septate, 1 per cent 



3-septate, 12 per cent, 32 x 4.3 (28-36 x 3.9-4.4) ^ 



4-septate, 21 per cent, 34 x 4.5 (29-41 x 4. 1-4.7) /x 



5-septate, 61 per cent, 44.5 x 4.5 (35-51 x 4.1-4.8)m 



6- and 7-septate, 3 per cent, 53 x 4.7 (49-54 x 4.3-5.2) ^ 



On potato stem plug, culture one hundred and seven days old; conidia 

 from a sporodochial mass (spores mostly with deteriorated ends) : 

 Conidia: 3-septate, 5 per cent 



4-septate, 15 per cent 



5-septate, 80 per cent, 49 x 4 (35-63 x 3.5-4.7) ju 



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

 mycelium : 

 Conidia: 1-septate, rare, 21 x 3.1^ (only one measured) 



3-septate, 11 per cent, 36.2 x 4 (28-42 x 3. 1^.8) m 



