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Conrad Bérubé |
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Pea Weevil
family: bruchidae
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Pea Weevil Bruchus pisorum (Linnaeus) Adults and larva are found in freshly harvested and stored seed. It is a sporadic pest in pea-growing areas in the Southern Interior of British Columbia.
Pea
Larvae hollow out the pea seeds, making them non-viable. Damage is not evident until larvae have matured.
The adult is a brown beetle, 5 mm long, with white and black mottling on the back, a white spot behind the head, and another at the end of the body. Larvae are minute when they bore through the pod and enter the seed.
There is one generation a year. Adults overwinter in peas, either in storage or in the field. They emerge at blossom time and feed on blossoms, petals, or leaves. Eggs are laid on the developing pods. Larvae burrow through the pods into the seeds where they remain for four to six weeks. Only one larva matures and pupates in a seed. Adults develop in the seed by late summer, where most remain until the following spring. They do not reproduce on dry seed.
Do not plant
infested seed unless it has been fumigated. Field trash should
be destroyed or turned under the soil. Insecticide should be
applied just prior to blossoming and again in two weeks to kill
adults before they lay eggs. |
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