Pesticides and honey bees: Nectar and pollen contamination in alfalfa treated with dimethoate
- 1 January 1980
- journal article
- Published by Springer Nature in Archives of Environmental Contamination and Toxicology
- Vol. 9 (2) , 125-133
- https://doi.org/10.1007/bf01055368
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.Keywords
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