Insect identification > Coleoptera > True Coleoptera > Broad-bean weevil

Broad-bean weevil

The broad-bean weevil (Bruchus rufimanus Bob.) in its life and habits more nearly resembles the pea weevil than the other species considered. It is injurious in Europe and Northern Africa and has established itself in California.

The beetles resemble the pea weevil but seem to prefer broad beans or horse beans. They appear in the fields in March and lay numbers of eggs on the bean pods and the grubs on hatching make their way to the young beans, several often entering one bean.

Feeding is completed by early August and the adults are produced later in the fall.
They generally winter in the beans but do not breed in dried beans, there being therefore only one generation a year.

The damage caused by the attacks of pea and bean weevils is of two kinds: injury by consuming the bulk of the seed and leaving the remainder unfit for food; and injury by so reducing the stored material or the germ itself that the seed cannot germinate and grow.