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Xylosandrus compactus gallery in a koa (Acacia koa) twig.

Xylosandrus compactus entry hole in a koa (Acacia koa) twig.

Adult female Xylosandrus compactus.

Shriveled koa twig after an infestation of black twig borers.

Shriveled koa twigs after an infestation of black twig borers.

Shriveled lychee twig after an infestation of black twig borers.

Wilting and shriveled coffee twig after an infestation of black twig borers (early stage).

Wilting and shriveled coffee twig after an infestation of black twig borers (mid stage).

 

Wilting and shriveled coffee twig after an infestation of black twig borers (late stage).

Wilting and shriveled coffee twigs after an infestation of black twig borers (early stage).

Definition

A twig borer is any one of several species of small beetles which bore into twigs of shrubs and trees, as the black twig borer, Xylosandrus compactus.