The Two-lined Chestnut Borer is a slender, metallic buprestid beetle whose larvae tunnel under the bark of oaks and chestnuts, girdling branches and killing stressed trees. Adults are dark metallic green-bronze with two pale yellowish stripes on the elytra. It becomes a serious pest during and after droughts when trees are stressed and less able to resist infestation.
Best time to see a Two-lined Chestnut Borer
The best time to see a Two-lined Chestnut Borer is May–June, when about 69% of U.S. sightings happen, based on 302 research-grade iNaturalist observations.
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Recent Two-lined Chestnut Borer sightings near you
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