Free access
Issue
Apidologie
Volume 36, Number 4, October-December 2005
Page(s) 623 - 633
DOI http://dx.doi.org/10.1051/apido:2005048
Published online 15 November 2005
Apidologie 36 (2005) 623-633
DOI: 10.1051/apido:2005048

Contact and oral toxicity to honey bees (Apis mellifera) of agents registered for use for sweet corn insect control in Ontario, Canada

Janisse Baileya, Cynthia Scott-Dupreea, Ron Harrisa, Jeff Tolmanb and Brenda Harrisc

a  University of Guelph, Department of Environmental Biology, Guelph, ON, Canada N1G 2W1
b  Agriculture and Agri-Food Canada, Southern Crop Protection and Food Research Center, 1391 Sandford St., London, ON, Canada N5W 4T3
c  Dow AgroSciences Canada Inc., #201 - 1144 29th Av. N.E., Calgary, AB, Canada T2E 7P1

(Received 12 August 2005 - revised 1 March 2005 - accepted 1 April 2005; Published online: 15 November 2005)

Abstract - Assays were conducted to compare direct and residual contact and oral toxicities to honey bees of sweet corn insecticides and of Bt-sweet corn. Direct contact assays focusing on LC50 determined that technical grade clothianidin was most toxic, > carbofuran, > imidacloprid = spinosad, > lambda-cyhalothrin, > Bacillus thuringiensis. In residual contact assays, forager age bees were exposed to treated non-transgenic sweet corn tassels. Carbofuran treated tassels caused significant mortality up to 2 and 3 days after treatment (DAT) in 2002 and 2003, respectively. Lambda-cyhalothrin treated tassels had no impact on honey bees in 2002; in 2003, their toxicity was significantly higher than the untreated control tassels for 1 DAT. In both years, spinosad, imidacloprid and clothianidin or Bt-sweet corn tassels had no impact on honey bee mortality. Pollen collected from insecticide field treated corn and fed to honey bees had no impact on mortality.


Key words: Apis mellifera / sweet corn / foliar insecticides / seed treatment / Bt-sweet corn / toxicity

Corresponding author: Cynthia Scott-Dupree cscottdu@uoguelph.ca

© INRA, DIB-AGIB, EDP Sciences 2005

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.