508 H. R. POWERS, JR. 



Table 2. Amount of infection on 16 species of hard pines resulting 

 from inoculations with 6 rust collections 





Cronartium 



fusi forme 



Cronartium 



b 



querouum 



Pine species 



631 



632 



645 



WSP1 



648 



671 





0, 

 



0, 



0, 

 



0, 

 



0, 



% 



Loblolly 



28 



45 



35 



27 



20 



1 



Slash 



53 



42 



58 



48 



17 



54 



South Florida Slash 



82 



82 



85 



76 



85 



85 



Short leaf 



1 



4 







4 



5 







Virginia 



2 



1 







2 



43 







Spruce 



-- 















3 



Trace 



Pond 







1 



7 



1 



1 







Sand 



3 















54 



1 



Jack 



1 















1 



70 



Pitch 







1 











3 







Ponderosa 



77 



78 



74 



91 



63 



75 



Jefferey 



76 



81 



65 



76 



78 



86 



Monterey 



81 



79 



68 



79 



78 



89 



Red 



























Austrain 



39 



39 



39 



36 



52 



73 



Scots 



12 







1 



1 



-- 



27 



Cultures 631, 632, and 645 from loblolly pine; culture WSP1 from 

 slash pine. J 



Culture 648 from Virginia pine; culture 671 from jack pine. 



