204 BOTANICAL GAZETTE [SEPTEMBER 
TABLE VIill—Continued 
FusARIuM FUSARIUM 
TRICHOTHECIOIDES OXYSPORUM 
12 days 12 days 
WOM BON is ek oe i ise hs No growth | Good growth 
She SE a ee Slight “ « « 
. EMEA eaten o Sle Oust cgb : . i! . _ 
UM eee a ceo an * . . i 
Sec aq per cent dextrost Vic... 2. cs Excellent “ . re 
MUG OEMs 5 oe ob ices eh ek Slight . . ¥ 
SR Ro eer ons ee No - . 
pyar eaaghaeed & Wager acre cyt) cos rae er ey No “ . # 
8 PRE ae aN ne Os ie ze 2 . 
- . a | } 8 - . 
+ 5 cc. 10 per cent dextrose, V............. Excellen . “5 . 
CN A Ba a as No : 
. Oe Ra ee a ee Poor . : 
= PERE yy eke eee chit oe ae. . “ . 
. WAV aay yeas cays uve & i $ 
+5 Cc. 30 per cent dextrose, Vo. 25. 2... Slight . . . 
Peers ee No . No : 
POWER Coc eeares oe Circo ves ee Me . . . 
Wee Ns are ek * Ms 6 . 
el stiriagh Eat a LRN Soe oriNSY oy, ESA er CE Me . 
“5 cc. 10 per cent dextrose, V...........-.. 4 . ie : 
BME OR ee - Fair . Fair - 
OE Be ea eck cat “ . : ‘ 
SOOM oS ee . . 2 
I eee oe . " : 
A marked difference was found in the ability of the two organ- 
isms to use the fatty acids, F. trichothecioides being much more 
restricted in its ability. The experiments with alcohol and the 
acids also showed that the former organism was much more readily 
poisoned and inhibited in its growth. It was found that F. oxy- 
sporum grew well in 1 per cent ethyl alcohol, and that F. trichotheci- 
oides made no growth. The solution was then diluted one-half, 
whereupon F. trichothecioides made a good growth. This was 
clearly a case of inhibition. The growth of F. trichothecioides was 
inhibited by N/100 acetic acid, as can be seen by the fact that it 
grew in N/125 concentration and that it grew in N/100 when glu- 
cose was added, while F. oxysporum grew well in N/100 acetic acid. 
N/rtoo formic acid was toxic to F. trichothecioides, while it merely 
inhibited growth with the other organism. The latter grew in 
N/125 formic acid, while F. trichothecioides did not grow in N/500 
