Fusarium in Tuber Rot and Wilt of Potato 



29 



these were added at the rate of 10 gm. per liter. Potato extract 

 medium was made up by extracting 500 gm. ground potato tuber 

 with 500 cc. Il..< >. and then adding 500 cc. of the foregoing solution 

 In the extract. 



A series of cultures ( table 1 1 ) was run at 12° C. and the amount 

 of dry weight formed determined at 2 day intervals fur 10 days. In 

 1 hi- series the medium was at 12 C. at the time of inoculation 



TABLE II 



Dry weight ( in milligrams) in potato extract medium; temperature 12° C. 



Table 111 shows the growth by day intervals made for 10 days 

 when levulose was used as the carbon source. The solutions 

 were at the temperature's indicated at the lime of inoculation. 



TABLE III 

 Dry weight iin milligrams) formed by day intervals 



