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What are the main physical characteristics of the adult Cyphocleonus achates weevil?

Reference

Abdominal features were found to be the most dependable characteristics for use when determining the sex of adult C. achates. Published by Elsevier Inc. Keywords: Root weevil; Cyphocleonus achates; Curculionidae; Knapweed; Centaurea maculosa; Asteraceae; Weed; Adult emergence; Sex traits; Morphology; Biological control 1.

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www.academia.edu

The pupal period lasts about two weeks. The new adult weevil chews a hole in the root to emerge. DISPERSAL METHOD: The adult weevil is flightless. Walking is the only method of dispersal. Photo 1: Cyphocleonus achates (adult)

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www2.gov.bc.ca

Cyphocleonus achates - Wikipedia Cyphocleonus achates is a species of true weevil known as the knapweed root weevil. Cyphocleonus achates "knapweed root weevil". "Comparison of Larval Development and Overwintering Stages of the Spotted Knapweed Biological Control Agents Agapeta zoegana (Lepidoptera: Tortricidae) and Cyphocleonus achates (Coleoptera: Curculionidae) in Montana Versus Eastern Europe". Impacts of the biological control agent Cyphocleonus achates on spotted knapweed, Centaurea maculosa, in experimental plots. "Influence of herbivory and competition on invasive weed fitness: observed effects of Cyphocleonus achates (Coleoptera: Curculionidae) and grass-seeding treatments on spotted knapweed performance" (PDF). "Effect of Summer Drought Relief on the Impact of the Root Weevil Cyphocleonus achates on Spotted Knapweed". Evaluation of establishment of Cyphocleonus achates and its potential impact on spotted knapweed.

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en.wikipedia.org

OpenAI's Answer

The adult Cyphocleonus achates, also known as the knapweed root weevil, is a large and flightless insect. Its distinct characteristics make it a notable biological control agent for invasive knapweed species. Here are some of the primary physical characteristics of this weevil:

  1. Size: Cyphocleonus achates is considered larger compared to other knapweed weevils.
  2. Color: It is typically lighter in color with mottled patterns, distinguishing it from the black or brown coloring seen in most other weevil species such as those from the Larinus genus.
  3. Mobility: The adult weevil is flightless; it relies on walking for dispersal.

Below are some images of the adult Cyphocleonus achates for better visualization:

  • Cyphocleonus achates Image 1
  • Cyphocleonus achates Image 2
  • Cyphocleonus achates Image 3

For more specific details, you can visit the Wikipedia entry for Cyphocleonus achates and additional resources on the weevil's impact and characteristics.

Follow Up

Related

How does Cyphocleonus achates contribute to controlling knapweed populations?

Is Cyphocleonus achates known to prefer a specific type of knapweed?

In which U.S. national forest was Cyphocleonus achates released in summer 2009?

What types of knapweed are targeted by Cyphocleonus achates for biocontrol?

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