Barascou L. auteur aut IRD Requier Fabrice auteur aut IRD Sene D. auteur aut IRD Crauser D. auteur aut IRD Le Conte Y. auteur aut IRD Alaux C. auteur aut IRD text journalArticle eng text/pdf born digital access Pesticide risk-assessment guidelines for honeybees (Apis mellifera) generally require determining the acute toxicity of a chemical over the short-term through fix-duration tests. However, potential long-lasting or delayed effects resulting from an acute exposure (e.g. a single dose) are often overlooked, although the modification of a developmental process may have life-long consequences. To investigate this question, we exposed young honeybee workers to a single sublethal field-realistic dose of a neurotoxic pesticide, sulfoxaflor, at one of two amounts (16 or 60 ng), at the moment when they initiated orientation flights (preceding foraging activity). We then tracked in the field their flight activity and lifespan with automated life-long monitoring devices. Both amounts of sulfoxaflor administered reduced the total number of flights but did not affect bee survival and flight duration. When looking at the time series of flight activity, effects were not immediate but delayed until foraging activity with a decrease in the daily number of foraging flights and consequently in their total number (24 and 33% less for the 16 and 60 ng doses, respectively). The results of our study therefore blur the general assumption in honeybee toxicology that acute exposure results in immediate and rapid effects and call for long-term recording and/ or time-to-effect measurements, even upon exposure to a single dose of pesticide. specialized Ecotoxicology Bees Acute exposure Sublethal effects Pesticide risk assessment 080 021 020 805 150351 [6 p.] 2022 0048-9697 https://www.documentation.ird.fr/hor/fdi:010083239 10.1016/j.scitotenv.2021.150351 0048-9697 [F B010083239] https://www.documentation.ird.fr/hor/fdi:010083239 https://www.documentation.ird.fr/intranet/publi/2021-11/010083239.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2021-11-10 2025-02-24 fdi:010083239 fre