How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Bean weevils

Weevil eggs may be glued to the bean or the pod (cowpea weevil), glued to green pods (broad bean weevil), or laid loosely among beans or through cracks in the pods (bean weevil). The larval and pupal stages are spent inside the bean. Adults emerge from beans through a round hole in the bean seed coat. Bean weevil infestations can start in the garden or in trash beans. Damage is a combination of feeding and contamination.

 

Weevil Eggs
Weevil Eggs
Pupa and larva
Pupa (top) and Larva
Emergence holes
Emergence holes
Adult weevil
Adult weevil

Statewide IPM Program, Agriculture and Natural Resources, University of California
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