A container full of knapweed root boring weevils.

Photo By/Credit

USFWS

Date Shot/Created

07/26/2017

Media Usage Rights/License

Public Domain

Image

Knapweed root boring weevils, Cyphocleonus achates, are effective biological control agents because they weaken or kill existing knapweed plants.

Facility

Litchfield Wetland Management District

Ecosystem

Prairie

Subject tags

Biological control

Insects

Invasive species

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