Article

Archives of Environmental Contamination and Toxicology

, Volume 9, Issue 2, pp 125-133

First online:

Pesticides and honey bees: Nectar and pollen contamination in alfalfa treated with dimethoate

  • Roy J. BarkerAffiliated withCarl T. Hayden Bee Research Center, U.S. Department of Agriculture
  • , Yolanda LehnerAffiliated withCarl T. Hayden Bee Research Center, U.S. Department of Agriculture
  • , Michael R. KunzmannAffiliated withCarl T. Hayden Bee Research Center, U.S. Department of Agriculture

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

Medicago sativa L. (Leguminosae) sprayed withO,O-dimethylS-(N-methylcarbamoylmethyl) phosphorodithioate (dimethoate) had only 0.5 ppm of dimethoate in pollen one day later, but 3 ppm in nectar one week later, and 1 ppm in nectar two weeks later. As little as 1 ppm added to syrup fed to caged workers ofApis mellifera L. (Apidae) inhibited cholinesterase and reduced survival. Bees given a choice between treated and untreated syrups showed no preference; this suggests that the levels of dimethoate found in nectar are toxic and not repellent.