Sub-lethal effects of thiamethoxam, a neonicotinoid pesticide, and propiconazole, a DMI fungicide, on colony initiation in bumblebee (Bombus terrestris) micro-colonies

Autor: Charlotte Elston, Keith F. A. Walters, Helen M. Thompson
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: Apidologie
Apidologie, Springer Verlag, 2013, 44 (5), pp.563-574. ⟨10.1007/s13592-013-0206-9⟩
ISSN: 0044-8435
1297-9678
DOI: 10.1007/s13592-013-0206-9⟩
Popis: International audience; This study investigated whether field-realistic exposure to a neonicotinoid insecticide and a fungicide affected nest building or brood production in queenless Bombus terrestris micro-colonies in the laboratory. Bees were exposed to honey water and pollen paste containing field-realistic mean or field-maximum exposure rates of thiamethoxam (1, 10 μg/kg) or propiconazole (23, 230 mg/kg) for 28 days. Thiamethoxam: Both doses reduced consumption of honey water solution and resulted in fewer wax cells. At 10 μg/kg, nest building initiation was delayed, fewer eggs were laid and no larvae produced. Propiconazole: Both doses reduced consumption of honey water solution. At 23 mg/kg, fewer wax cells were produced. Thus, at realistic (mean) exposure rates of these pesticides, no adverse impacts on brood production were found. Pesticide-free alternative forage will reduce field exposure by dilution and thus the impact of maximum rates.
Databáze: OpenAIRE
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