FusARiA OF Potatoes 159 



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



from pseudopionnotes : 



Conidia: 0-septate, rare 



1-septate, 11 per cent, 17 x 3.1 (12-22 x 2.9-3.5)^ 

 2-septate, 7 per cent, 28 x 3.8 (20-32 x 2.9-4.3) ^ 

 3-septate, 68 per cent, 43.7 x 3.8 (33-67 x 3-4.4)^ 

 4-septate, 4 per cent, 55 x 4.2 (47-65 x 4-4.4) ^ 

 5-septate, 10 per cent, 63 x 4.4 (57-72 x 4-4.8)ac 



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



aerial mycelium : 



Conidia: 0-septate, rare 



1-septate, 1 per cdnt 



3-septate, 5 per cent, 43 x 3.8 (25^8 x 3.5-4.4) ^u 

 4-septate, 14 per cent, 45 x 3.8 (38-54 x 3-4.6)m 

 5-septate, 80 per cent, 51 x 4.2 (42-60 x 3.5-4.7)/* 

 6-septate, rare 



On potato tuber plugs, culture ninety-two days old; conidia from a mass 

 of minute sporodochia: 

 Conidia: 0-septate, rare 



1-septate, 3 per cent 



2-septate, 2 per cent 



3-septate, 25 per cent, 31 x 3.8 (24-36 x 3-4.1)/i 



4-septate, 17 per cent 



5-septate, 53 per cent, 46 x 3.9 (36-58 x 3.5-4.7)/* 



6-septate, rare, 55-60 x 3.8-4.7/t (only a few measured) 



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

 conidia from aerial mycelium: 

 Conidia: 0-septate, 40 per cent 

 1-septate, 35 per cent 

 2-septate, 5 per cent 



3-septate, 14 per cent, 41 x 4.2 (33-44 x 3.5-4.8) /t 

 4-septate, 5 per cent, 48 x 4.6 (42-53 x 4-5.3) /t 

 5-septate, 1 per cent, 56x4.7 (53-58 x 4,3-4.9) /i (only five 

 spores measured, the largest 60 x 5.7/t) 



