40 W rt-:*. M It. w ?im m n 'V. n. tfj m % 



2. In tlic syntlictic solution wliicli 1 liavc used, both tannic acid and 

 citric acid retard tlic t^rowtli of the fungus. 



3. In tlie jKitato agar medium, citric acid stimuhitos the growth of the 

 fungus in a low concentration, -while in a high percentage of citric acid the 

 growth of the fungus is retarded. 



4. In the s)'uthetic solution which I have used, tlie minimum, optimum 

 and ma.ximuin teniiicraturcs for the growth of the fungus are lO'C. to 12'C., 

 3o"C. and 36''C. to 37^C. res])ecti\ely. 



5. Wet lu-at of 50'^C. annihilates the germinating power of the conidia 

 within two hours. 



6. Wet heat of 6o"C. does not kill the chlam\-dospores or " Dauelmycel " 

 of the fungus within three hours. 



7. \t the low temperature of-21'C. the vitalit}' (jf the fungus is not 



injured. 



Botanical Institute 



Hokkaido Imperial University 



Sapporo Japan. 



VI. Bibliography 



I. Ames, A. (191 5). Tlie temperature relation of some fungi causing 

 storage rot. (Ph)-topath. \'ol. \'. Xo. 1. p. II-19. 1915.) 

 '2. Appel, O. & Wollenweber, H. W. (1913). Grundlagen einer Mono- 

 gra[ihie der Gattung Fusarium (Link.). (Arbeiten aus der Keiser- 

 lichen Biologischen Anstalt für Land- und Forstwirtschaft. ^^^. 

 ]?oud, I. Heft.) 



3. ]'olle\-, H. L. (1901). Flax wilt and flax-sick soil. (Government Agric. 



Fxp't Stat. for N. Dakota. Bull. Xo. 50. Dec. 1901.) 



4. Bollcy, H. L. (1901). .\. preliminar}- note on the cause of Flax-Sick 



Soil. Fusarium Hid sp. nov. (Proceeding 22nd Annual Meeting 

 of Society for Promotion of Agricultural Science, 1901.) 



5. Bolle)-, H. L. (1902). Preliminary efforts to develop a continuous 



process of seed disinfection by means of formaldehyde vapour. 

 (Proceeding 23rd Annual Meeting of Society for Promotion Agri- 

 cultural Science. 1902.) 



