FusARiA OF Potatoes 185 



Hab. In tuberibus putridis Solani tuberosi una cum F. Solani et F. 

 oxysporo, New York, Amer. bor. 



Measurements of conidia on different media are as follows: 



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

 from pseudopioiinotes : 

 Conidia: 0-septate, 2 per cent 



1-septate, 10.5 per cent, 19 x 3.5/* 



2-septate, 5.5 per cent, 28 x 3.7 /jl 



3-septate, 37 per cent, 32.5 x 4.2 (24-50 x 3.9^.7)/* 



4-septate, 6 per cent, 45 x 4.2ju 



5-septate, 33 per cent, 48 x 4.5 (40-62 x 3.9-5.3) /x 



6- to 10-septate, 6 per cent, 50-90 x 5-6. 1/* 



On hard potato agar, culture eighty-six days old; conidia from a smaU 

 sporodochium, semi-dry : 

 Conidia: 3-septate, nearly 100 per cent, 29.5 x 3.4 (20-41 x 3-4) )u 



On red raspberry cane plug, culture fifty-two days old: 



(1) Conidia of sporotrichial form 



Conidia: 0-septate, 97 per cent, 9.5x6.5 (7-12 x 4-7. 5)m 

 1-septate, 3 per cent, 13.5 x 5.2 (10-15 x 4.8-6) ^ 

 2-septate, rare 

 3-septate, exceptional, one measured, 21 x 5.2/z 



(2) Conidia of sickle-shaped form 



Conidia: 0-septate, 35 per cent, 11 x 2.9 (10-13 x 2.5-3. 1)/* 

 1-septate, 60- per cent, 15.5x3.2 (12-22 x 2.9-3.5) /i 

 2-septate, very rare 

 3-septate, 5 per cent, 25 x 3.5 (20-28 x 3-4) m 



On hard lima-bean agar with 2 per cent glucose, culture 10 days old; 



conidia from a pseudopionnotes : 



Conidia: 0-septate, 5 per cent, 10 x 3 (5.2-16 x 2.1-3. 7)/* 

 1-septate, 15 per cent, 22 x 3.3 (16-28 x 3-3.5)^ 

 2-septate, 2 per cent 



3-septate, 22 per cent, 33 x 3.8 (27-49 x 3.5-4.8) ju 

 4-septate, 23 per cent, 45 x 4 (38-49 x 3.9-4. l)/x 

 5-septate, 30 per cent, 51 x 4.1 (41-62 x 3.5^.7) m 



