Life SciencesEcologyEntomologyForest EntomologyForest PathologyInsect PathologyBark Beetle EcologyForest Insect Outbreak DynamicsForest Insect PestsInsect Damage To WoodWood DecayForest Pest EcologyForest Pest OutbreaksTree DiebackTree Mortality Dynamics
The bronze birch borer, Agrilus anxius Gory, is an important factor in the decadence and death of paper birch and yellow birch. Shade and ornamental trees as well as forest trees are affected. This insect has been reported in Canada from Newfoundland to British Columbia ,and in the United States from Maine to Idaho. Outbreaks developed during the period of widespread birch dieback which continued in the Northeastern United States and Canada for 25 years beginning in the early 1930's. Although the borer is generally considered a secondary insect, populations built up in many dieback areas, and apparently healthy trees were attacked and killed.
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