Twig Beetle

Twig Beetle


Twig beetles bore into pinon pines, conifers, and black walnut trees, and create colonies there. They’re a natural pruning agent, but can also be the carrier of destructive fungi.

Common Name:   Twig Beetles

Photo: Twig beetle holes
Holes made by adult twig beetles leaving infested twig.

Species: Pityophthorus spp.
Pseudopityophthorus spp.
And others
Common Hosts: Hardwoods
Description: Adult — approximately 1-3 mm long; light brown to shiny black head and body; body cylindrical.
Larva — size variable, 1-3 mm long when mature; brown head, white body.
Importance: Generally, twig beetles are limited to recently cut, damaged, stressed, or dying branches but not always. Most times they are beneficial branch pruners. Some species may transport pathogenic fungi, such as wilts.
Signs of Infestation: Foliage discoloration and/ or wilt. Small holes (approximately 1-2 mm wide) in twigs or branches. Pitch or sap present or absent. Fine boring dust caught in bark crevices. Small galleries under bark or in the pith of branches and twigs.
Control: Prune off and destroy beetle-infested twigs and branches. Promote tree vigor and health to minimize the possibility of beetle infestation and to aid in the recovery from attack. Use an approved insecticide for high-value trees.

Need help controlling a suspected twig beetle infestation?
Call Arborscape at 303-806-TREE or click here to request your free evaluation and treatment options!



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