|scientific name Agrilus pensus |
common name Alder-birch Borer
June, July and August.
This is another species very similar to A. anxius. In adults, dorsally, the colour tends to be a dark coppery red, sometimes with purple reflections. These beetles maybe separated in part by host association, alder.
Eggs are laid on live branches of birch or alder, hatching in about 2 weeks. Larval boring is irregular in habit, rapidly killing the branch. Mature larvae overwinter in pupal chambers, pupating the following spring, and emerging as adults in late May or June (Carlson and Knight, 1969).
The species has been reared from alder (Alnus rugosa) and black birch (Betula nigra) in eastern North America (Carlson and Knight, 1969). In Alberta the specimen was associated with alder.
The species is found from Alberta east to Nova Scotia and south in the eastern United States to Pennsylvania (Bright, 1987).
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