More Honey Bees Dying, Even as Antibiotic Use Halves

Posted on Tuesday, July 29th, 2025

Written by U of G News

Dr. Brendan Daisley, a young man with a short beard, wears a lab coat and poses outside a brick building with several colourful bee boxes/hives and a laptop
Dr. Brendan Daisley is the lead author of the study.

A new study led by University of Guelph researchers and funded in part by the Ontario Agri-Food Innovation Alliance is the first large-scale project to assess antibiotic usage trends and their impact on honey bee health in Canada.

The withdrawal of antibiotics, following recent regulation changes, was one of the top predictors of honey bee overwintering mortality — a result that surprised lead author Dr. Brendan Daisley.

Read the story on U of G News: More Honey Bees Dying, Even as Antibiotic Use Halves

Read the scientific paper, published in Nature Sustainability.

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