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Bumblebees can be Exposed to the Herbicide Glyphosate when Foraging

机译:Bumblebees can be Exposed to the Herbicide Glyphosate when Foraging

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摘要

Herbicides are the most widely used pesticides globally. Although used to control weeds, they may also pose a risk to bee health. A key knowledge gap is how bees could be exposed to herbicides in the environment, including whether they may forage on treated plants before they die. We used a choice test to determine if bumblebees would forage on plants treated with glyphosate at two time periods after treatment. We also determined whether glyphosate and its degradation product aminomethylphosphonic acid were present as residues in the pollen collected by the bees while foraging. Finally, we explored if floral resources (nectar and pollen) remained present in plants after herbicide treatment. In general bees indiscriminately foraged on both plants treated with glyphosate and controls, showing no avoidance of treated plants. Although the time spent on individual flowers was slightly lower on glyphosate treated plants, this did not affect the bees' choice overall. We found that floral resources remained present in plants for at least 5 days after lethal treatment with glyphosate and that glyphosate residues were present in pollen for at least 70 h posttreatment. Our results suggest that bees could be exposed to herbicide in the environment, both topically and orally, by foraging on plants in the period between herbicide treatment and death. Identifying this route of exposure is a first step in understanding the risks of herbicides to bees. The effects of herbicides on bees themselves are uncertain and warrant further investigation to allow full risk assessment of these compounds to pollinating insects.

著录项

  • 来源
    《Environmental toxicology and chemistry /》 |2022年第10期|2603-2612|共10页
  • 作者单位

    School of Agriculture and Food Science, University College Dublin, Dublin, Ireland,Earth Institute, University College Dublin, Dublin, Ireland;

    School of Natural Sciences, Trinity College Dublin, Dublin, Ireland;

    School of Chemical Sciences and DCU Water Institute, Dublin City University, Dublin, IrelandSchool of Natural Sciences, Trinity College Dublin, Dublin, Ireland,School of Chemical Sciences and DCU Water Institute, Dublin City University, Dublin, Ireland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类
  • 关键词

    Pesticides; Ecotoxicology; Risk assessment;

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