118 



EFFECTS OF TEMPERATURE ON FUNGI 



90 



85 



80 



75 



70 



65 



60 



B 55 

 1 



I 50 



8 45 



I 



"o 

 o 



i 



s 



1 



40 



35 - 



30 



25 



20 



15 



10 



Fusarium discolor 

 var. sulphureum 



Fusarium 

 oxysporum 



Fusarium 

 radicicola 



15 20 25 

 Degrees Centigrade 



Fig. 11. The growth, measured in terms of diameter of colonies, of soil- 

 inhabiting pathogens as influenced by temperature. Verticillhtm albo-atrwn 

 has the slowest growth rate; 25° C is the optimum temperature. (After 



Edson and Shapovalov.) 





