Table 2 — R*s between rust factors and various environmental factors 1 



Environmental factors 



oyrnpiorn 01 inicviion 



pi 



1 at 

 Lai 



Long 



KIW 



OVw 



A7 

 Hi. 



Diet 



iniociion 





n nfl** 



u.uo 



u.uo 



n no,** 



U XJC. 



u.uo 





Roci ctant 



1 s** 



nfl** 



.uo 



ns** 



no** 



CO 



riR** 



0,9 



oto/i/^rioc r\i rocictani^o* 

 ^dltryui lt?o Ul iColMctllUfc;. 

















Nn nall^ or hark rpaftinn<i 



o 



o 



o 



o 



o 



o 



o 



Bark reactions only 



.01 



.02 



.01 



.02 



.01 



.01 







Gall death 



.01 



.02 



.02 



.02 







.02 



.01 



Trees with galls or bark 

















reactions 































Rate of gall appearance 











.02 



.01 







.01 







Rust-killed trees 







.01 











.02 











"Significantly different at 1 percent. 



1 EI = elevation, Lat = latitude, Long = longitude, NW = northwest departure, SW = southwest departure, Az = azimuth, 

 Dist = distance from the inoculum source in miles. 



BRITISH COLUMBIA 



Figure 3— Level of infection of populations of ponderosa pine to gall rust. Numbers represent 

 predicted percentage at the mean elevation of all populations (3,525 ft). Contour lines repre- 

 sent lines of equal performance. The interval between contour lines equals 1 /2[/sc(0.2)] and 

 lines represent positive or negative deviations from the mean value of all populations. 



4 



