Port-Orford<edar killed by Port-Orford<edar root disease is common 

 along roads where the disease<ausing fungus is spread in soil by 

 vehicles and road construction. 



mortality has been extensive, especially 

 along streams and downslope drainage 

 ditches. Mortality is less and often absent 

 on drier microsites. An interagency and in- 

 terregional coordinating 

 group provides technical 

 assistance on Port-Orford- 

 cedar management for fed- 

 eral agencies. 



Some of the strategies for 

 controlling Port-Orford-cedar 

 root disease include the fol- 

 lowing: 



• Close roads and restrict 

 operations to reduce move- 

 ment of infested soil. 



• Clean vehicles and equip- 

 ment before entering or 

 leaving specified areas to 

 remove soil that may con- 

 tain spores. 



• Berm roadsides to reduce 

 splash and runoff. 



Big, old sugar pines, invaluable for 

 their beauty and ecological func- 

 tion, are being killed by a combin- 

 atJon of drought, overcrowding, 

 bark beetles, and blister rust 



• Remove Port-Orford-ce- 

 dar from roadsides to 

 prevent infestation of dis- 

 ease-free stands. 



• Identify resistant trees 

 and breed them for resis- 

 tance to the fungus. 



• Retain Port-Orford-ce- 

 dar in portions of stands 

 where conditions are un- 

 favorable for the disease. 



Five-Needle Pines 

 Bark beetles and 

 blister rust are killing 

 five-needle pines — 



Five-needle pines, in- 

 cluding sugar pine, 

 western white pine, 

 and whitebark pine, are 

 declining throughout 

 southwestern Oregon. 

 Mountain pine beetles 

 are killing large five- 

 needle pines, especially those stressed by in- 

 Jury, disease, or intense competition. Recent 

 high rates of beetle-caused pine mortality are 

 due mainly to overly dense stocking caused 

 by fire suppression, com- 

 pounded by the recent de- 

 cade of drought. 



White pine blister rust af- 

 fects all five-needle pines, 

 causing topkill, branch mor- 

 tality, and tree death. The 

 disease has been in south- 

 western Oregon since the 

 mid 1920s and many sites 

 are conducive to infection 

 because moisture, as clouds 

 or fog, in the late summer 

 and early fall allows rust 

 spores to germinate and in- 

 fect pines. Rates of infection 

 and subsequent mortality 

 are high in pine regeneration, 

 and large infected trees are 

 more vulnerable to bark 

 beetle attack. 



Oregon — 42 



