Larvae burrow into green seed. Throughout United States. Most troublesome in Utah, Idaho, Washington, Oregon, California and New York. Pea weevils overwinter as adults in protected areas, such as outbuildings, tree bark, or fenceposts. When temperatures reach about 20 C weevils migrate to the borders of pea fields.
Mature larvae pupate in pods for about two weeks.
Begin net sweeps at flowering stage and continue until pods begin to dry. Sweep along borders of fields about 2 yards into the crop, especially along edges which border any potential hibernation locations such as outbuildings, hedgerows, etc. After 25 sweeps count weevils. Repeat these 25 sweeps at 5-10 additional locations around field. If the number of pea weevils collected averages two or more per 25 sweeps treatment is warranted.