Incense cedar – interaction of abiotic factors with insect pests

Scattered pockets of fading or recently killed incense cedar are evident locally in our area. Examination of the boles indicates some colonization by cedar bark beetles (Phleosinus spp.). However, flatheaded woodborers (Buprestids) are most frequently associated with dead or dying trees. Most flatheaded woodborers infest recently killed or very severely stressed trees. Therefore, they are commonly associated with trees damaged by fire, wind, flooding, or drought. Many flatheaded woodborer species infest logging residues as well. Severe moisture stress is probably the main factor predisposing incense cedars to woodborer attack in our area.  In past years, unseasonal freezes have also apparently contributed to incense cedar stress and subsequent mortality in some areas. 

From the article "ALL THOSE DEAD TREES" in the Spring 2003 Applegator
By Ellen Michaels Goheen and Don Goheen, with additions by Max Bennett

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