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Unexpected Effects of Low Doses of a Neonicotinoid Insecticide on Behavioral Responses to Sex Pheromone in a Pest Insect

In moths, which include many agricultural pest species, males are attracted by female-emitted sex pheromones. Although integrated pest management strategies are increasingly developed, most insect pest treatments rely on widespread use of neurotoxic chemicals, including neonicotinoid insecticides. R...

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Autores principales: Rabhi, Kaouther K., Esancy, Kali, Voisin, Anouk, Crespin, Lucille, Le Corre, Julie, Tricoire-Leignel, Hélène, Anton, Sylvia, Gadenne, Christophe
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4269385/
https://www.ncbi.nlm.nih.gov/pubmed/25517118
http://dx.doi.org/10.1371/journal.pone.0114411
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author Rabhi, Kaouther K.
Esancy, Kali
Voisin, Anouk
Crespin, Lucille
Le Corre, Julie
Tricoire-Leignel, Hélène
Anton, Sylvia
Gadenne, Christophe
author_facet Rabhi, Kaouther K.
Esancy, Kali
Voisin, Anouk
Crespin, Lucille
Le Corre, Julie
Tricoire-Leignel, Hélène
Anton, Sylvia
Gadenne, Christophe
author_sort Rabhi, Kaouther K.
collection PubMed
description In moths, which include many agricultural pest species, males are attracted by female-emitted sex pheromones. Although integrated pest management strategies are increasingly developed, most insect pest treatments rely on widespread use of neurotoxic chemicals, including neonicotinoid insecticides. Residual accumulation of low concentrations of these insecticides in the environment is known to be harmful to beneficial insects such as honey bees. This environmental stress probably acts as an “info-disruptor” by modifying the chemical communication system, and therefore decreases chances of reproduction in target insects that largely rely on olfactory communication. However, low doses of pollutants could on the contrary induce adaptive processes in the olfactory pathway, thus enhancing reproduction. Here we tested the effects of acute oral treatments with different low doses of the neonicotinoid clothianidin on the behavioral responses to sex pheromone in the moth Agrotis ipsilon using wind tunnel experiments. We show that low doses of clothianidin induce a biphasic effect on pheromone-guided behavior. Surprisingly, we found a hormetic-like effect, improving orientation behavior at the LD20 dose corresponding to 10 ng clothianidin. On the contrary, a negative effect, disturbing orientation behavior, was elicited by a treatment with a dose below the LD0 dose corresponding to 0.25 ng clothianidin. No clothianidin effect was observed on behavioral responses to plant odor. Our results indicate that risk assessment has to include unexpected effects of residues on the life history traits of pest insects, which could then lead to their adaptation to environmental stress.
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spelling pubmed-42693852014-12-26 Unexpected Effects of Low Doses of a Neonicotinoid Insecticide on Behavioral Responses to Sex Pheromone in a Pest Insect Rabhi, Kaouther K. Esancy, Kali Voisin, Anouk Crespin, Lucille Le Corre, Julie Tricoire-Leignel, Hélène Anton, Sylvia Gadenne, Christophe PLoS One Research Article In moths, which include many agricultural pest species, males are attracted by female-emitted sex pheromones. Although integrated pest management strategies are increasingly developed, most insect pest treatments rely on widespread use of neurotoxic chemicals, including neonicotinoid insecticides. Residual accumulation of low concentrations of these insecticides in the environment is known to be harmful to beneficial insects such as honey bees. This environmental stress probably acts as an “info-disruptor” by modifying the chemical communication system, and therefore decreases chances of reproduction in target insects that largely rely on olfactory communication. However, low doses of pollutants could on the contrary induce adaptive processes in the olfactory pathway, thus enhancing reproduction. Here we tested the effects of acute oral treatments with different low doses of the neonicotinoid clothianidin on the behavioral responses to sex pheromone in the moth Agrotis ipsilon using wind tunnel experiments. We show that low doses of clothianidin induce a biphasic effect on pheromone-guided behavior. Surprisingly, we found a hormetic-like effect, improving orientation behavior at the LD20 dose corresponding to 10 ng clothianidin. On the contrary, a negative effect, disturbing orientation behavior, was elicited by a treatment with a dose below the LD0 dose corresponding to 0.25 ng clothianidin. No clothianidin effect was observed on behavioral responses to plant odor. Our results indicate that risk assessment has to include unexpected effects of residues on the life history traits of pest insects, which could then lead to their adaptation to environmental stress. Public Library of Science 2014-12-17 /pmc/articles/PMC4269385/ /pubmed/25517118 http://dx.doi.org/10.1371/journal.pone.0114411 Text en © 2014 Rabhi et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Rabhi, Kaouther K.
Esancy, Kali
Voisin, Anouk
Crespin, Lucille
Le Corre, Julie
Tricoire-Leignel, Hélène
Anton, Sylvia
Gadenne, Christophe
Unexpected Effects of Low Doses of a Neonicotinoid Insecticide on Behavioral Responses to Sex Pheromone in a Pest Insect
title Unexpected Effects of Low Doses of a Neonicotinoid Insecticide on Behavioral Responses to Sex Pheromone in a Pest Insect
title_full Unexpected Effects of Low Doses of a Neonicotinoid Insecticide on Behavioral Responses to Sex Pheromone in a Pest Insect
title_fullStr Unexpected Effects of Low Doses of a Neonicotinoid Insecticide on Behavioral Responses to Sex Pheromone in a Pest Insect
title_full_unstemmed Unexpected Effects of Low Doses of a Neonicotinoid Insecticide on Behavioral Responses to Sex Pheromone in a Pest Insect
title_short Unexpected Effects of Low Doses of a Neonicotinoid Insecticide on Behavioral Responses to Sex Pheromone in a Pest Insect
title_sort unexpected effects of low doses of a neonicotinoid insecticide on behavioral responses to sex pheromone in a pest insect
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4269385/
https://www.ncbi.nlm.nih.gov/pubmed/25517118
http://dx.doi.org/10.1371/journal.pone.0114411
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