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emerald ash borer damage

Six-part image. Top left (a) shows a small yellowish white insect larva next to the tunnel it has chewed through light-colored wood. Top middle (b) shows a tree trunk with bark removed by a person holding a knife, where a zig-zag trail left by an insect larva can be seen. Top right (c) shows a crack in the bark of a tree, through which a zig-zag trail left by an insect is partially visible. Bottom left (d) shows a finger pointing to a small hole in the bark of a tree. Bottom middle (e) shows the lower portion of a tree trunk where much of the bark has been roughly broken off. Bottom right (f) shows a tree with several short branches with leaves arising from the very bottom section of the trunk.

Symptoms and signs of emerald ash borer (Agrilus planipennis) infestation include : a) late-stage larva extracted from its gallery, b) serpentine “zig-zag” galleries that etch the outer sapwood as larvae feed on inner bark (phloem); c) bark split over an old larval gallery; d) holes in the bark left by woodpeckers preying on late stage EAB larvae, e) bark scraped by woodpeckers preying on EAB larvae, f) stump sprouts and epicormic shoots on heavily infested trees. (Photo originally published in Sadof et al 2023, Journal of Integrated Pest Management)

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