Bruchidius villosus

Bruchidius villosus is a species of bean weevil known by the common names broom seed beetle and Scotch broom bruchid. This beetle is used as an agent of biological pest control against the noxious weed known as Scotch broom (Cytisus scoparius). This is a dark gray weevil about two millimeters long. The female lays about ten eggs on the seed pod of the plant. The larva hatches from the egg at the point it is attached to the pod and burrows into the pod, where it develops and feeds on the seeds. The larva is one to two millimeters long and gelatinous white. It pupates in the seed coat. When the seed pod ripens and splits open, adult weevils emerge.