Neonicotinoids in excretion product of phloem-feeding insects kill beneficial insects

Proceedings of the National Academy of Sciences of the United States of America
Miguel Calvo-AgudoAlejandro Tena

Abstract

Pest control in agriculture is mainly based on the application of insecticides, which may impact nontarget beneficial organisms leading to undesirable ecological effects. Neonicotinoids are among the most widely used insecticides. However, they have important negative side effects, especially for pollinators and other beneficial insects feeding on nectar. Here, we identify a more accessible exposure route: Neonicotinoids reach and kill beneficial insects that feed on the most abundant carbohydrate source for insects in agroecosystems, honeydew. Honeydew is the excretion product of phloem-feeding hemipteran insects such as aphids, mealybugs, whiteflies, and psyllids. We allowed parasitic wasps and pollinating hoverflies to feed on honeydew from hemipterans feeding on trees treated with thiamethoxam or imidacloprid, the most commonly used neonicotinoids. LC-MS/MS analyses demonstrated that both neonicotinoids were present in honeydew. Honeydew with thiamethoxam was highly toxic to both species of beneficial insects, and honeydew with imidacloprid was moderately toxic to hoverflies. Collectively, our data provide strong evidence for honeydew as a route of insecticide exposure that may cause acute or chronic deleterious effects on ...Continue Reading

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Citations

Jun 6, 2020·Environmental Science and Pollution Research International·Andrea VeresLorenzo Furlan
Sep 4, 2020·Proceedings of the National Academy of Sciences of the United States of America·S D Frank, J F Tooker
Jun 9, 2020·Frontiers in Microbiology·Shimei PangShaohua Chen
Aug 7, 2020·Insects·Robin A ChoudhuryW Douglas Gubler
Dec 2, 2020·Environmental Pollution·Miguel Calvo-AgudoAlejandro Tena
Mar 6, 2021·Current Opinion in Insect Science·John F Tooker, Kirsten A Pearsons
Apr 8, 2021·Communications Biology·Jonathan WillowEve Veromann
May 1, 2021·Environmental Pollution·Verena StroblLars Straub
May 7, 2021·The Science of the Total Environment·Angela MinnameyerLars Straub
Apr 11, 2021·Plant, Cell & Environment·Karen J KlothMarcel Dicke
Aug 1, 2021·Environmental Pollution·Miguel Calvo-AgudoAlejandro Tena
Aug 28, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Aleksandra LeskaAnna Górczyńska

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Methods Mentioned

BETA
Enzyme-Linked ImmunoSorbent Assay

Software Mentioned

MassHunter
R
Survival
GL Sciences
MassHunter Workstation Software
multcomp

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