Raspberry Fruitworm, Byturus unicolor (Say) (Coleoptera: Byturidae)
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Raspberry fruitworm is distributed throughout the eastern United States wherever raspberries are grown.
Adult beetles are yellowish brown, hairy and about 8 mm long. Adults lay grayish-white eggs on swollen, unopened blossom buds, which may be deposited at the base of the developing fruit. Eggs hatch into larvae within a few days, and the emerging larvae feed on the developing fruit for 5–6 weeks. Larvae pupate in the soil inside of a cocoon. Raspberry fruitworm overwinters as an adult, and emerges the following year when blossoms begin to develop.
Raspberry fruitworm larvae feed on raspberry receptacles, causing berries to dislodge from the plant stems. In some cases, larvae feed on internal tissues of immature berries. Adults feed on blossom and foliage but rarely cause significant damage. High populations of adult fruitworm may result in characteristic longitudinal holes in the foliage.
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- Baker, W (1949) Biology and control of the western raspberry fruit worm in western Washington. Bull State Coll Wash Agric Exp Stn 497: pp. 63
- Raspberry Fruitworm, Byturus unicolor (Say) (Coleoptera: Byturidae)
- Reference Work Title
- Encyclopedia of Entomology
- pp 3410-3411
- Print ISBN
- Online ISBN
- Springer Netherlands
- Copyright Holder
- Springer Science+Business Media B.V.
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- John L. Capinera (1)
- Editor Affiliations
- 1. Dept. Entomology and Nematology, University of Florida
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