The seasonal activity of <i>Trachyphloeus bifoveolatus</i> (Coleoptera: Curculionidae) in western Washington

Authors

  • D. A. Barstow Western Washington Research and Extension Center Puyallup, WA
  • L. W. Getzin Western Washington Research and Extension Center Puyallup, WA

Keywords:

<i>Trachyphloeus bifoveolatus</i>, Coleoptera, Curculionidae

Abstract

<i>Trachyphloeus bifoveolatus</i> Beck breeds in untended grassland fields and pastures and can be a nuisance pest to nearby homeowners when adults migrate in the fall and spring. This insect is univoltine and overwinters as an adult. Eggs are deposited on the foliage of the host plant during May and June and larvae start appearing in late May. Larvae feed on the root systems of these plants during May, June and July. Pupae are found in small earthen pockets 2- to 5-em below ground from July to mid-August. New generation adults appear in late July and within a month most begin leaving the fields to seek overwintering sites. However, evidence suggests that most of the eggs deposited the following yea are laid by adults that remain in the field over winter. Adults that left the field in the fall apparently do not return to breeding sites in substantial numbers the following spring.

References

Brown, W.J. 1940. Notes on the American distribution of some species of Coleoptera common to the European and North American continents. Can. Entomol. 72:65-78.

Brown, W.J. 1950. The extralimital distribution of some species of Coleoptera. Can. Entomol. 82:197-205.

Brown, W.J. 1965. Trachyphloeus Germar (Coleoptera: Curculionidae) in North America. Can. Entomol. 97:189-192.

Buchanan, L.L. 1937. Entomology: Notes on Curculionidae (Coleoptera). J. Wash. Acad. Sci. 27(7):312-316.

Cram, W.T. 1964. Occurrence of the small black root weevil, Trachyphloeus bifoveolatus (Beck) (Coleoptera: Curculionidae), on strawberry in British Columbia. Proc. Entomol. Soc. B.C. 61:39-40.

Hatch, M.H. 1971. The beetles of the Pacific Northwest. Part V. Univ. Wash. Press, Seattle. 662 pp.

LeConte, J.L. and G.H. Horn. 1876. The Rhychophora of America north of Mexico. Proc. Am. Phil. Soc. 15:1-455.

Lindroth, C.H. 1957. The faunal connections between Europe and North America. John Wiley, N.Y. 344 pp.

Sleeper, E.L. 1955. A review of the Trachyloeini of America north of Mexico (Coleoptera: Curculionidae). Ohio J. Sci. 55(5):279-292.

Downloads

Published

2019-09-17

Issue

Vol. 82 (1985): Journal of the Entomological Society of British Columbia

Section

Articles

License

Authors who publish with the Journal of the Entomological Society of British Columbia agree to the following terms:

-Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

-Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

-Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).