40 



Research Bulletin No. u 



TABLE VIII— Continued 



Palmitic acid I 



"II 



" III 



- IV 



+ 5 cc. 10 per cent dextrose, V 



Stearic acid, I 



"II. . 



" III 



" IV. 



+ 5 cc. 10 per cent dextrose, V. 



Oleic acid, I 



"II......... 



" III 



" IV 



+ 5 cc. 10 per cent dextrose, V. 



Palm oil, I 



•' '• II 



.. m 



" IV 

 + 5 cc. 10 per cent dextrose, V. 

 olive oil, I 



" II 

 " " III 



" IV 



FrsARUM 

 TRICHOTHECIO'DES 



12 days 



FUSARIUM 

 OXYSFORUM 



12 days 



No growth Good growth 



Slight 



Excellent 



Slight 



No 



Excellent 



No 



Poor 



Slight 

 No 



Fail- 



Fair 



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 

 icid also showed that the former organism was much more readily 

 i. isi ned and inhibited in its growth. It was found that F. o.vy- 

 \j iritm grew well in 1 per cent ethyl alcohol, and that / ; . 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 X* 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- 

 c se was added, while / ; . oxysporum grew well in N Inn acetic acid. 

 N inn formic acid was t..\ic to F. trichothecioides, while it merely 

 inhibited growth with the other organisms. The latter grew in 

 N 125 formic acid, while F. trichothecioides did not grow in X 500 

 solution. N 100 proprionic acid was toxic to both, while both 



