Bronze birch borer
The bronze birch borer, Agrilus anxius, is common east of the Cascades. Damage to trees can be severe, often deadly.
The presence of the bronze birch borer in the Portland metro area had been positively confirmed as of October 23, 2003. The population looks extensive, quite established and has killed trees in the Beaverton/Tigard area. This is in addition to a positive identification in Corvallis. This flatheaded beetle borer will likely increase its distribution in Western Oregon. It may be possible to slow the movement of this borer by good site selection and choice of more resistant birches, cultural habits, and proper management of existing infestations which may include chemical intervention or tree removal. If you know landscapers in the area, please let them be alert to this.
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