Fusariion 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. H,0, and then adding 500 cc. of the foregoing solution 

 to the extract. 



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

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

 this series the medium was at 12 C. at the time of inoculation. 



TABLE II 



Dry weight (in milligrams) in potato extract medium; temperature i2°C. 



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

 when levulose was used as the carbon source. The solutions 

 were at the temperatures indicated at the time of inoculation. 



TABLE III 



Dry weight (in milligrams) formed by day intervals 



