Responses of the cabbage seedpod weevil,
                    Ceutorhynchus obstrictus
                    (Marsham) (Coleoptera: Curculionidae), to seed treatments of canola (
                    Brassica napus
                    L.) with the neonicotinoid compounds clothianidin and imidacloprid

Lloyd M Dosdall

doi:10.1002/ps.1818

journal article Jul 29, 2009

Responses of the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae), to seed treatments of canola ( Brassica napus L.) with the neonicotinoid compounds clothianidin and imidacloprid

Lloyd M Dosdall

Pest Management Science Vol. 65 No. 12 pp. 1329-1336 · Wiley

View at Publisher Save 10.1002/ps.1818

Abstract

Abstract

BACKGROUND:
The cabbage seedpod weevil,
Ceutorhynchus obstrictus
(Marsham), is a major pest in the production of canola (
Brassica napus
L.) in North America and Europe, and effective population control is often essential for economical crop production. In North America, neonicotinoid insecticides have been used for several years in canola as seed treatments for reducing herbivory by flea beetles. The neonicotinoids clothianidin and imidacloprid were investigated to determine their effects on preimaginal development and on emergence of new‐generation adults of
C. obstrictus
in comparison with effects of lindane, a chlorinated hydrocarbon seed treatment.

RESULTS:
Mean numbers of second‐ and third‐instar larvae were significantly higher in plants seed‐treated with lindane than in plants treated with the neonicotinoid compounds, even though weevil oviposition was similar for all treatments. Emergence of new‐generation adults was reduced by 52 and 39% for plants seed‐treated with clothianidin and imidacloprid, respectively, compared with emergence from plants treated with lindane.

CONCLUSION:
Seed treatment with both clothianidin and imidacloprid produced systemic insecticidal effects on larvae of
C. obstrictus
, with clothianidin slightly more effective than imidacloprid. Use of clothianidin or imidacloprid as seed treatments can comprise an important component in the integrated management of cabbage seedpod weevil in canola. Copyright © 2009 Society of Chemical Industry

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Details

Published: Jul 29, 2009
Vol/Issue: 65(12)
Pages: 1329-1336
License: View

Authors

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Lloyd M Dosdall

Cite This Article

Lloyd M Dosdall (2009). Responses of the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae), to seed treatments of canola ( Brassica napus L.) with the neonicotinoid compounds clothianidin and imidacloprid. Pest Management Science, 65(12), 1329-1336. https://doi.org/10.1002/ps.1818

Responses of the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae), to seed treatments of canola ( Brassica napus L.) with the neonicotinoid compounds clothianidin and imidacloprid

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