Table 4. --Effect of various temperatures on six Fusarium isolates grown on potato dextrose agar, 

 as indicated by "number of colonies developed after being heated 15, 30, or 60 minutes. 



Isolate 



Temperature 

 in Degrees F. 



15 Minutes 



Exposure Tinne 



30 Minutes 



60 Minutes 



55-8 



55-12 



55-15 



55-31 



55-52 



55-69 



135 

 136 

 137 



135 

 136 

 137 

 138 

 139 



130 

 131 



135 

 136 



137 

 138 

 139 



137 

 138 



135 

 136 

 137 

 138 



* 



70 







* 

 * 

 * 

 8 

 2 



14 

 



* 

 75 

 16 

 22 



2 



30 

 



42 



57 



2 



2 



30 

 8 

 



75 



42 



40 



2 



1 



3 

 



81 



57 



1 



3 







30 

 



17 

 9 

 

 



3 

 

 



12 

 2 



7 

 

 



1 







11 

 1 





 

 



1 









 

 

 



''Colonies too numerous to count. 



cles had settled, the water was poured off. The cultures were incubated at 24 de- 

 grees C, for 6 days, and the colonies growing on each plate were counted, figs. 2 

 and 3. Later, similar tests were made in whichheat periods of 1, 2, 3, 4, 5, 6, 24, 

 and 48 hours were used. 



Stromatinia cultures grew poorly after they had been dispersed in the Waring 

 Blendor"! Because of this poor growthwhole oats were tried as media for the subcul- 

 tures of Stromatinia. Later Curvularia and Fusarium also were grown on oats. 



Table 5. --Effect of various tennperatures on two Fusarium isolates grown on whole oat grains, as 

 indicated by number of grains in which fungus sur\-ived after being heated 15, 30, or 60 minutes. 



Isolate 



Temperature 

 in Degrees F. 



15 Minutes 



Exposure Time 



30 Minutes 



60 Minutes 



55-52 



55-62 



140 

 142 

 143 



134 

 135 

 136 

 137 





 6 

 1 

 



