The impact of landscape structure on pesticide exposure to honey bees

Shumpei Hisamoto, Makihiko Ikegami, Koichi Goka and Yoshiko Sakamoto ()
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Shumpei Hisamoto: National Institute for Environmental Studies
Makihiko Ikegami: National Institute for Environmental Studies
Koichi Goka: National Institute for Environmental Studies
Yoshiko Sakamoto: National Institute for Environmental Studies

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Pesticides may have serious negative impacts on bee populations. The pesticide exposure of bees could depend on the surrounding landscapes in which they forage. In this study, we assess pesticide exposure across various land-use categories, while targeting the Japanese honey bee, Apis cerana japonica, a native subspecies of the eastern honey bee. In a project involving public participation, we measured the concentrations of major pesticides in honey and beeswax collected from 175 Japanese honey bee colonies across Japan and quantitatively analyzed the relationships between pesticide presence/absence or pesticide concentration and land-use categories around the colonies. Our findings revealed that the surrounding environment in which bees live strongly influences pesticide residues in beehive materials, whether the pesticides are systemic or not, with a clear trend for each land-use category. Agricultural lands, particularly paddy fields and orchards, and urban areas resulted in higher pesticide exposure, whereas forests presented a lower risk of exposure. To effectively control pesticide exposure levels in bees, it is essential to understand pesticide usage patterns and to develop appropriate regulatory systems in non-agricultural lands, similar to those in agricultural lands.

Date: 2024
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DOI: 10.1038/s41467-024-52421-3

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