FusARiA OF Potatoes 137 



On red raspberry cane plug, culture seventy-one days old: 

 Conidia: 3-septate, 2 per cent 

 4-septate, 3 per cent 



5-septate, 90 per cent, 43 x 4.6 (36-49 x 4-5.2) m 

 6-septate, 5 per cent, 46x4.8 (43-53 x 4.3-5.2) m 



On hard lima-bean agar with 2 per cent glucose, culture one hundred 



and nineteen days old: 



Conidia: 1-septate, 2.5 per cent, 15 x 2.7^1 (only two measured) 

 8-septate, 3 per cent, 30 x 3.6 (10-44 x 3-4.7) m 

 4-septate, 5 per cent 



5-septate, 81 per cent, 49 x 4.7 (42-55 x 4.3-5.2) /x 

 6-septate, 6 per cent, 51 x 4.9 (45-56 x 4.6-5.2) /i 

 7-septate, 2.5 per cent, 52 x 5.2 (47-58 x 5.2) ^ 

 8-septate, exceptionally rare, 58 x 5.4 (only one measured) 



On hard lima-bean agar, culture eleven days old: 

 Conidia: 0-septate, rare 



2-septate, 2 per cent 



3-septate, 30 per cent, 30 x 3.6 (20-40 x 3^.3) /i 



4-septate, 5 per cent 



5-septate, 62 per cent, 54.5x4.5 (43-65 x 3.5-5.2)/x 



6-septate, 1 per cent, 64x4.8 (59-70 x 4.6-5.3) m 



7-septate, rare, same as 6-septate 



Average of the above measurements: 

 Conidia: 0-septate, very rare 



1-septate, 0.5 per cent 

 2-septate, 0.5 per cent, 15 x 2.7/x 

 3-septate, 9.5 per cent, 30 x 3.6^i 

 4-septate, 5.5 per cent 

 5-septate, 77.5 per cent, 49.1 x 4.56)U 

 6-septate, 5.5 per cent, 54 x 4.9^ 

 7-septate, 1 per cent, 58x5.1^1 

 8-septate, very rare, 58 x 5.4^ 



Averages of Appel and Wollenweber's (1910:184) measurements are as 

 follows : 



Conidia: 5-septate, 46 x 4. 7;u 

 6-septate, 49 x 4 An 



