From: University of Guelph
Published May 10, 2017 08:07 AM

Neonic Pesticides Threaten Wild Bees' Breeding: Study

Neonicotinoid pesticides hinder wild queen bumblebees’ reproductive success, according to a new University of Guelph study.

The study is the first to link exposure to thiamethoxam — one of the most commonly used neonicotinoid pesticides — to fewer fully developed eggs in queens from four wild bumblebee species that forage in farmland.

“Queen bees will only lay eggs when the eggs are fully developed,” said Prof. Nigel Raine, holder of the Rebanks Family Chair in Pollinator Conservation.

If queens need to use energy to clear pesticides from their system instead of investing in eggs, then fewer fully developed eggs will result, he said.


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