Table 1 . --Number of Cronartium ribicola urediospore cultures derived from a population 

 of single aeciospore cultures grown in cool chamber on Ribes hudsonanium 

 var. petiolare INT Clone-1 that produced teliospores at various times after 

 inoculation when grown at two different temperatures on INT Clone-1 



Days after inoculation 

 Treatment 21 28 35 49 Total 



Aeciospore Urediospore 

 culture to subculture 



Cool 



to cool 



19 



18 







4 



41 



Cool 



to warm 











1 



4 



5 





Total 



19 



18 



1 



8 



46 



Table 8. --Number of Cronartium ribicola urediospore cultures derived from a population 

 of single aeciospore cultures grown in warm chamber on Ribes hudsonianum 

 var. petiolare INT Clone-1 that produced teliospores at various times after 

 inoculation when grown at two different temperatures on INT Clone-1 



Days after inoculation 

 Treatment ~21 28 35 49~" Total 



Aeciospore Urediospore 

 culture to subculture 



Warm to cool 7 12 1 2 22 



Warm to warm 10 1 2 



Total 8 12 1 3 24 



Table 9. --Number of Cronartium ribicola urediospore cultures derived from two 



populations of single aeciospore cultures , one grown in a 70 F+2 (21 C+1 ) 

 chamber, the other grown in a 55 F+2 (13 C+1) chamber and both grown on 

 Ribes liudsonianum var. petiolare, that produced teliospores at various times 

 after inoculation when grown at 55 F+2 (13 C+1) on INT Clone-1 



Days after inoculation 

 Treatment ~Tl 28 35 49~ Total 



Aeciospore Urediospore 

 culture to subculture 



Warm 



to cool 



7 



12 



1 



2 



22 



Cool 



to cool 



19 



18 







4 



41 





Total 



26 



30 



1 



6 



63 



= 2.95 P of larger = 0.40 



d.f. = 3 



6 



