Table 6 -Effect of high temperatures on subsequent teliospore germination 



Mean number basidiospores cast^ 



Exposure Temperatures (degrees C.)^ 



time 26 30 



(hours) Control Dry Moist Dry Moist 



850 



4 



890 



860 



567 



600 



8 



674 



710 



910 



655 



24 



702 





396** 



249** 



48 



240** 



68** 



266** 



154** 



72 



170** 



^ J ** 



262** 



33** 



^ Based on whole telia prepared as described in text. 

 ^ Based on 5 telia for each treatment. 

 ^Temperatures ±0.5° C. 



**Significantly different from control at 0.01 level as detected by Duncan's New Multiple 

 Range Test (Duncan 1955). 



Table 1 .-Effect of exposure to outdoor conditions on viability of basidiospores 



Exposure treatment 



Subsequent 

 germination 



Percent ' 



Midday December sunshine in Logan, Utah, at -1° to 

 -6° C. air temperature: 



Vi hr. on dry glass 

 54 hr. on water agar 

 2 hr. in distUled water 







99 



Midday August sunshine (6,000 to 7,000 foot-candles) on 

 Cache NF near Beaver Mountain: 



"■A hr. on glass at 24% r.h. and 22° to 29° C 

 1 hr. on glass at 19% rJi. and 34° to 41° C. 

 Vi hr. on water agar at 17° to 22° C. 



1 hr. on water agar at 17° to 22° C. 



2 hr. on water agar at 19° to 23° C. 



Midday August shade (200 foot-candles) near Beaver 

 Mountain: 



91 

 

 100 

 100 



85 



1 hr. on glass at 28% r Ji. at 25° to 30° C. 



29 



^ Based on a sample ste of from 47 to 200 spores. 



11 



