FusARiA OF Potatoes 213 



On corn agar, culture one hundred and seventy-two days old; most of 

 the conidia with chlamydospores : 



(1) Pseudopionnotal conidia (only those without chlamydospores were 



measured) 

 Conidia: 3-septate, 32 x 4ja 

 4-septate, 35 x 4.1/i 

 5-septate, 37 x 4.2^1 



(2) Chlamydospores in conidia very numerous, 0-septate predominant, 



7.3x6.8 (6-10x5-9)m 



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

 and eighteen days old : 



(1) Chlamydospores in conidia very numerous, 0-septate predominant, 



7.2x5.7 (6-8x5.2-6) M 



(2) Sporodochial conidia 



Conidia: 3-septate, 99 per cent, 33 x 4.2 (29-39 x 3.8-4.7)^ 



4-septate, 1 per cent, 36 x 4.3 (x (only three measured) 



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

 lium (chlamydospores in conidia not observed): 

 Conidia: 0-septate, 46 per cent, about 11 x 2.6ju 



1-septate, 4 per cent, about 16 x 3.lAt 



2-septate, 1.5 per cent 



3-septate, 48 per cent, 32 x 4 (23-41 x 3.5-4.3) .u 



4-septate, 0.5 per cent, 35 x 4.1ai (only two measured) 



On same medium as above, culture thirteen days old; conidia from 

 aerial mycelium: 

 Conidia: 0-septate, 25 per cent 



l-septate, 6 per cent 



2-septate, 1 per cent 



3-septate, 63 per cent, 35 x 4.2 (30-40 x 3.9-4.7) ^ 



4-septate, 5 per cent, 37.8x4.4 (33^1 x 4^.7) ^ 



Average of the above measurements: 

 Conidia: 0-septate, 20 per cent 8.4 x 2.6iU 

 1-septate, 1.5 per cent, 15 x 3.2/u 

 2-septate, 3.5 per cent, 20 x 3.4/i 

 3-septate, 69 per cent, 33.9 x 4.07 /r 

 4-septate, 5 per cent, 39.4 x 4.23^4 

 5-septate, 1 per cent, 41.1 x 4.32/* 



