Mature white 
pine in Idaho. 
FuTuRE stands of timber like this are 
threatened because the white pine blister 
tust attacks and kills the young trees. 
Already enormous values have been de- 
stroyed. New areas are threatened, and no 
adequate control organization exists. Con- 
trol in threatened areas is_ established 
through eradication of currant and goose- 
berry plants, upon which the rust must 
spend a part of its life cycle in order to 
develop. 
