Fusaria of Potatoes 189 



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

 sporodochia : 

 Conidia: 1-septate, 1 per cent, about 14 x 3.5 /* (only one measured) 



3-septate, 10 per cent, 35 x 3.6 (27-43 x 3-4.4) n 



4-septate, 12 per cent 



5-septate, 77 per cent, 45 x 4 (35-51 x 3.3-4.8) p 



6- and 7-septate, rare, 52 x 4.5/x (only two measured) 



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

 from aerial mycelium: 

 Conidia: 0-septate, rare 



1-septate, 2 per cent 



2-septate, rare 



3-septate, 50 per cent, 31 x 3.7/x 



4-septate, 25 per cent, 40 x 4/i 



5-septate, 23 per cent, 42 x 4.2 (35-48 x 3.9-4.7)/* 



On whole steamed potato tubers, culture forty-nine days old : 



(1) Conidia from numerous small sporodochia, close to the substratum 

 Conidia: 3-septate, 6 per cent, about 30 x 3.5 (only a few spores measured) 



4-septate, 6 per cent 



5-septate, 80 per cent, 46 x 4.1 (40-53 x 3.9-4.1 ) M 

 6-septate, 5 per cent, 54 x 4.1 (42-65 x 4-4.7) m 

 7 septate, 3 per cent, 59 x 4.2 (48-65 x 4. 1-4.5) M 

 10 septate, only one was observed, 58 x 4.3/* (the largest) 



(2) Conidia from small sporodochia, in aerial mycelium 

 Conidia: 3-septate, rare 



4-septate, rare 



5-septate, nearly 100 per cent, 51 x 4 (45-55 x 3.6-4.3)/* 



6-septate, rare 



On medium soft agar, culture eleven days old; conidia from aerial 

 mycelium close to substratum: 

 Conidia: 1-septate, 2 per cent, 24 x 3.2 (only a few measured) 



3-septate, 8 per cent, 42 x 4/* (only a few measured) 



4-septate, 10 per cent 



5-septate, 77 per cent, 45 x 4.1 (41-62 x 3.1-4.8)/* 



6-septate, 3 per cent, 49 x 4.3/* (only a few measured) 



