Skip to main content Accessibility help
×
Home

Evaluation of foliar and seed treatments for control of the cabbage seedpod weevil (Coleoptera: Curculionidae) in canola1

  • H.A. Cárcamo (a1), L.M. Dosdall (a2), D. Johnson (a3) and O. Olfert (a4)

Abstract

Caged assays and field tests were used to evaluate the effectiveness of organophosphorus, pyrethroid, neonicotinoid, and biologically derived insecticides for reducing populations of the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham), a new pest of canola in Canada. Complete mortality of caged weevils occurred 48 h after treatment with disulfoton, deltamethrin, carbofuran, oxydemeton-methyl, and chlorpyrifos. Under field conditions, using plots or large strips in commercial fields from 1998 to 2001, only deltamethrin and cyhalothrin-lambda (both pyrethroids) consistently reduced weevil densities, even at high population levels. Chlorpyrifos also significantly reduced weevil numbers and damage in some years, but results were variable and efficacy was too low to manage weevils under outbreak densities. Other insecticides such as spinosad provided moderate weevil control and may have a role in weevil management depending on their effect on beneficial insects relative to more efficacious insecticides. Treatment of canola seed with imidacloprid, lindane, or acetamiprid did not reduce weevil damage. Further research is needed to establish economic thresholds for C. obstrictus in canola, to assess the effect of insecticides on nontarget natural enemies of canola insect pests, and to assess the potential for integration of chemical agents with biological and cultural control strategies.

Des bioessais en cages et des tests sur le terrain nous ont permis d'évaluer l'efficacité d'insecticides organophosphorés, pyréthrinoïdes et néonicotinoïdes, ainsi que des insecticides d'origine biologique, pour la réduction des populations du charançon des siliques de colza, Ceutorhynchus obstrictus (Marsham), un nouveau ravageur du canola au Canada. Un traitement au disulfoton, à la deltaméthrine, au carbofuran, à l'oxydéméthon-méthyle ou au chlorpyrifos entraîne une mortalité totale des charançons en cages en 48 h. Dans des parcelles ou des bandes dans des champs commerciaux en conditions naturelles de 1998 à 2001, seules la deltaméthrine et la cyalothrine-lambda (toutes deux des pyréthrinoïdes) réduisent les densités de charançons de façon soutenue, même lorsque les populations sont abondantes. Certaines années, le chlorpyrifos réduit aussi significativement les nombres de charançons et les dommages aux récoltes, mais ses effets sont variables et son efficacité trop faible pour le contrôle des charançons aux densités de niveau épidémique. D'autres insecticides, tels que le spinosad, procurent un niveau de contrôle moyen et peuvent avoir un rôle dans la lutte contre les charançons, tout dépendant de leur impact sur les insectes bénéfiques par comparaison à celui d'autres insecticides plus efficaces. Les traitements des graines de canola à l'imidaclopride, au lindane ou à l'acétamipride ne réduisent pas les dommages causés par les charançons. Il faudra faire des recherches supplémentaires pour établir les seuils économiques de densité de C. obstrictus dans les cultures de canola, pour évaluer l'impact des insecticides sur les ennemis naturels non ciblés des insectes ravageurs du canola et déterminer la possibilité d'intégrer les agents chimiques à des stratégies impliquant un contrôle biologique et des méthodes particulières de culture.

[Traduit par la Rédaction]

Copyright

Corresponding author

2Corresponding author (e-mail: carcamoh@agr.gc.ca).

Footnotes

Hide All
1

Lethbridge Research Centre contribution No. (387) 04038.

Footnotes

References

Hide All
Ali, S. 2004. Crop protection 2004. AGDEX 606–1. Alberta Agriculture, Food and Rural Development, Edmonton, Alberta.
Analytical Software. 2000. Statistix for Windows. Version 7 [computer program]. User manual. Analytical Software, Tallahassee, Florida.
Anonymous. 1996. Spinosad technical guide. Publication 200-03-001. DowElanco, Indianapolis, Indiana.
Baker, W.W. 1936. Notes on the European weevil, Ceutorhynchus obstrictus Payk., recently found in the state of Washington. The Canadian Entomologist, 8: 191193.
Bragg, D.E. 1999 a. Comparisons of insecticide strategies in spring canola. Arthropod Management Tests, 24: 205.
Bragg, D.E. 1999 b. Soft chemical research in spring canola. Arthropod Management Tests, 24: 206.
Brodeur, J., Leclerc, L.-A., Fournier, M., and Roy, M. 2001. Cabbage seedpod weevil (Coleoptera: Curculionidae): a new pest of canola in northeastern North America. The Canadian Entomologist, 133: 709711.
Brown, J., McCaffrey, J.P., Harmon, B.L., Davis, J.B., Brown, A.P., and Erickson, D.A. 1999. Effect of late season insect infestation on yield, yield components and oil quality of Brassica napus B. rapa B. juncea and Sinapis alba in the Pacific Northwest region of the United States. Journal of Agricultural Science, 132: 281288.
Buntin, G.D. 1998. Cabbage seedpod weevil (Ceutorhynchus assimilis, Paykull) management by trap cropping and its effect on parasitism by Trichomalus perfectus (Walker) in oilseed rape. Crop Protection, 17: 299305.
Buntin, G.D. 1999. Damage loss assessment and control of the cabbage seedpod weevil (Coleoptera: Curculionidae) in winter canola using insecticides. Journal of Economic Entomology, 92: 220227.
Buntin, G.D., McCaffrey, J.P., Raymer, P.L., and Romero, J. 1995. Quality and germination of rapeseed and canola seed damaged by adult cabbage seedpod weevil, Ceutorhynchus obstrictus (Paykull) [Coleoptera: Curculionidae]. Canadian Journal of Plant Science, 75: 539541.
Butts, R.A., and Byers, J.R. 1996. Cabbage seedpod weevil: a potential new pest of canola in southern Alberta. Pest Management News, 8:5.
Cárcamo, H.A., Dosdall, L., Dolinski, M., Olfert, O., and Byers, J.R. 2001. The cabbage seedpod weevil (Ceutorhynchus obstrictus [Marsham])—a review. Journal of the Entomological Society of British Columbia, 98: 201210.
Cárcamo, H.A., Entz, T., and Blackshaw, R.E. 2004. Sub-sampling canola plants (Brassica napus L.) to estimate cabbage seedpod weevil (Ceutorhynchus obstrictus Marsham) damage. Journal of Entomological Science, 39: 122124.
Carlson, E.C., Lange, W.H. Jr., and Sciaroni, R.H. 1951. Distribution and control of the cabbage seedpod weevil in California. Journal of Economic Entomology, 44: 958966.
Dmoch, J. 1965. The dynamics of a population of the cabbage seedpod weevil (Ceutorhynchus obstrictus Payk.) and the development of winter rape. Part I. Ekologia Polska Seria A, 13: 249287.
Dosdall, L.M., and Moisey, D.W. 2004. The developmental biology of cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae), in spring canola (Brassica napus L.) in western Canada. Annals of the Entomological Society of America, 97: 458465.
Dosdall, L.M., Moisey, D., Cárcamo, H.A., and Dunn, R. 2001. Cabbage seedpod weevil fact sheet. Agdex 622–21. Alberta Agriculture, Food and Rural Development, Edmonton, Alberta.
Dosdall, L.M., Weiss, R.M., Olfert, O., and Cárcamo, H.A. 2002. Temporal and geographical distribution patterns of cabbage seedpod weevil (Coleoptera: Curculionidae) in canola. The Canadian Entomologist, 134: 403418.
Doucette, C.F. 1947. Host plants of the cabbage seedpod weevil. Journal of Economic Entomology, 40: 838840.
Fox, A.S., and Dosdall, L.M. 2003. Reproductive biology of Ceutorhynchus obstrictus (Coleoptera: Curculionidae) on wild and cultivated Brassicacea in southern Alberta. Journal of Entomological Science, 38: 533544.
Harmon, B.L., and McCaffrey, J.P. 1997. Parasitism of adult Ceutorhynchus obstrictus (Coleoptera: Curculionidae) by Microctonus melanopus (Hymenoptera: Braconidae) in northern Idaho and eastern Washington. Journal of Agricultural Entomology, 14: 5559.
Harper, F.R., and Berkenkamp, B. 1975. Revised growth-stage key for Brassica campestris and B. napus. Canadian Journal of Plant Science, 55: 657658.
Mason, P.G., Baute, T., Olfert, O., and Roy, M. 2004. Cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae) in Ontario and Québec. Journal of the Entomological Society of Ontario, 134: 107113.
McCaffrey, J.P., O'Keefe, L.E., and Homan, H.W. 1986. Cabbage seedpod weevil control in winter rapeseed. Current Information Series 782. University of Idaho, College of Agriculture, Moscow, Idaho.
Mulla, M.S., Norland, R.L., Fanara, D.M., Darwazeh, H.A., and McKean, D.W. 1971. Control of chironomid midges in recreational lakes. Journal of Economic Entomology, 64: 300307.
Murchie, A.K., Williams, I.H., and Alford, D.V. 1997. Effects of commercial insecticide treatments to winter oilseed rape on parasitism of Ceutorhynchus assimilis Paykull (Coleoptera: Curculionidae) by Trichomalus perfectus (Walker) (Hymenoptera: Pteromalidae). Crop Protection, 16: 199202.
Ni, X., McCaffrey, J.P., Stoltz, R.L., and Harmon, B.L. 1990. Effects of postdiapause adult diet andtemperature on oogenesis of the cabbage seedpod weevil (Coleoptera: Curculionidae). Journal of Economic Entomology, 83: 22462251.
SAS Institute Inc. 1990. SAS system for personal computers. Release 6.04 [computer program]. SAS Institute Inc., Cary, North Carolina.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed