The Cowlitz County Noxious Weed Control Board released 600 bruchidius villosus for scotch broom biocontrol at the Sediment Retention Structure in 2014. The adults lay eggs on the seedpods; when they hatch, the larvae feed on the seeds. This is the third year the biocontrols have been released at the SRS. (Photos by Tim Darland, Bonneville Lock & Dam Project) [District pest plan focuses on early detection, rapid response]

The Cowlitz County Noxious Weed Control Board released 600 bruchidius villosus for scotch broom biocontrol at the Sediment Retention Structure in 2014. The adults lay eggs on the seedpods; when they hatch, the larvae feed on the seeds. This is the third year the biocontrols have been released at the SRS. (Photos by Tim Darland, Bonneville Lock & Dam Project)

The Cowlitz County Noxious Weed Control Board released 600 bruchidius villosus for scotch broom biocontrol at the Sediment Retention Structure in 2014. The adults lay eggs on the seedpods; when they hatch, the larvae feed on the seeds. This is the third year the
biocontrols have been released at the SRS. (Photos by Tim Darland, Bonneville Lock & Dam Project)