Impacts of neonicotinoid insecticides on the ovary development and feeding of wild bumblebee queens

Bumblebees are important pollinators of crops but their number are declining in the past years. In order to understand if exposure to neonicotinoid pesticides is a driver of these declines for a range of bumblebee species, a recent study examined the impacts of field-relevant doses of the neonicotinoid thiamethoxam on wild queens of four bumblebee species. The results showed that field-relevant doses of thiamethoxam can have sublethal impacts on ovary development in multiple species of wild-caught bumblebee queens. Moreover, it was shown that there is differential sensitivity among species which highlights the need of a more well-informed pesticide risk assessment and use. More info: