Knapweed Root Weevil

Larvae feed on the roots of the aggressive knapweed plant, which prevents other plants from growing near it.

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Image Credit: Tom H. from WA

Full-sized image #1 of the Knapweed Root Weevil

Thumbnail image #1 of the Knapweed Root Weevil

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Image Credit: Tom H. from WA

Full-sized image #2 of the Knapweed Root Weevil

Thumbnail image #2 of the Knapweed Root Weevil

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Image Credit: Tom H. from WA

Full-sized image #3 of the Knapweed Root Weevil

Thumbnail image #3 of the Knapweed Root Weevil

TAXONOMY:

Kingdom: Animalia

Phylum: Arthropoda

Class: Insecta

Order: Coleoptera

Family: Curculionidae

Genus: Cyphocleonus

Species: achates

The Knapweed Root Weevil is also known by the name(s) of: Root Boring Weevil. The Knapweed Root Weevil is typically 0.5 inches to 0.7 inches (15mm to 18mm) in size and has the following descriptors / identifiers: tiny black dots; white and yellow mottled color; pale; light-colored; long nose; snout; bent antennae; white legs; tubular.

It has a typical diet of the following: knapweed roots.

Color Identification Guide

Various colors commonly associated with this beetle.

Red

Yellow

White

Black

Beetle Anatomy

Territorial Area Map (Visual Reference Guide)

The map below showcases (in blue) the states and territories of North America where the Knapweed Root Weevil may be found (but is not limited to). This sort of data can be useful in seeing concentrations of a particular species over the continent as well as revealing possible migratory patterns over a species' given lifespan. Some species are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America.

Alaska

Hawaii

Prince Edward Is.

Canadian territory of British Columbia graphic

Canadian territory of Saskatchewan graphic

Contiguous United States shape map layer graphic

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