title: Unexpected effects of sublethal doses of insecticide on the peripheral olfactory response and sexual behavior in a pest insect.
abstract: Pesticides have long been used as the main solution to limit agricultural pests, but their widespread use resulted in chronic or diffuse environmental pollutions, development of insect resistances, and biodiversity reduction. The effects of low residual doses of these chemical products on organisms that affect both targeted species (crop pests) but also beneficial insects became a major concern, particularly because low doses of pesticides can induce unexpected positive--also called hermetic--effects on insects, leading to surges in pest population growth at greater rate than what would have been observed without pesticide application. The present study aimed to examine the effects of sublethal doses of deltamethrin, one of the most used synthetic pyrethroids, known to present a residual activity and persistence in the environment, on the peripheral olfactory system and sexual behavior of a major pest insect, the cotton leafworm Spodoptera littoralis. We highlighted here a hormetic effect of sublethal dose of deltamethrin on the male responses to sex pheromone, without any modification of their response to host-plant odorants. We also identified several antennal actors potentially involved in this hormetic effect and in the antennal detoxification or antennal stress response of/to deltamethrin exposure.
authors.affiliation: Sorbonne Université, UPMC-Paris 6, Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, 7 Quai Saint Bernard, F-75005, Paris, France.
authors.forename: Lisa
authors.initials: L
authors.lastname: Lalouette
authors.affiliation: Sorbonne Université, UPMC-Paris 6, Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, 7 Quai Saint Bernard, F-75005, Paris, France.
authors.forename: Marie-Anne
authors.initials: MA
authors.lastname: Pottier
authors.affiliation: Sorbonne Université, UPMC-Paris 6, Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, 7 Quai Saint Bernard, F-75005, Paris, France.
authors.forename: Marie-Anne
authors.initials: MA
authors.lastname: Wycke
authors.affiliation: Sorbonne Université, UPMC-Paris 6, Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, 7 Quai Saint Bernard, F-75005, Paris, France.
authors.forename: Constance
authors.initials: C
authors.lastname: Boitard
authors.affiliation: Sorbonne Université, UPMC-Paris 6, Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, 7 Quai Saint Bernard, F-75005, Paris, France.
authors.forename: Françoise
authors.initials: F
authors.lastname: Bozzolan
authors.affiliation: Sorbonne Université, UPMC-Paris 6, Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, 7 Quai Saint Bernard, F-75005, Paris, France.
authors.forename: Annick
authors.initials: A
authors.lastname: Maria
authors.affiliation: Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, INRA, Route de Saint-Cyr, F-78000, Versailles, France.
authors.forename: Elodie
authors.initials: E
authors.lastname: Demondion
authors.affiliation: Sorbonne Université, UPMC-Paris 6, Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, 7 Quai Saint Bernard, F-75005, Paris, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Chertemps
authors.affiliation: Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, INRA, Route de Saint-Cyr, F-78000, Versailles, France.
authors.forename: Philippe
authors.initials: P
authors.lastname: Lucas
authors.affiliation: Université de Rennes 1, UMR CNRS 6553 Ecobio, 263 Avenue du Gal Leclerc, CS 74205, 35042, Rennes, France.
authors.forename: David
authors.initials: D
authors.lastname: Renault
authors.affiliation: Sorbonne Université, UPMC-Paris 6, Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, 7 Quai Saint Bernard, F-75005, Paris, France.
authors.forename: Martine
authors.initials: M
authors.lastname: Maibeche
authors.affiliation: Sorbonne Université, UPMC-Paris 6, Institute of Ecology and Environnemental Sciences of Paris-Sensory Ecology Department, 7 Quai Saint Bernard, F-75005, Paris, France. david.siaussat@upmc.fr.
authors.forename: David
authors.initials: D
authors.lastname: Siaussat
mesh_terms: D000818:Animals; D057506:Arthropod Antennae / Q000187:drug effects* / Q000378:metabolism; D059165:Hormesis; D007305:Insecticide Resistance; D007306:Insecticides / Q000494:pharmacology*; D007928:Lethal Dose 50; D008297:Male; D009570:Nitriles / Q000494:pharmacology*; D010573:Pesticide Residues / Q000494:pharmacology*; D011722:Pyrethrins / Q000494:pharmacology*; D018035:Receptors, Odorant / Q000235:genetics / Q000378:metabolism; D012724:Sex Attractants / Q000378:metabolism; D012726:Sexual Behavior, Animal / Q000187:drug effects*; D018411:Spodoptera / Q000187:drug effects* / Q000254:growth & development
chemical_list: D007306:Insecticides; D009570:Nitriles; D010573:Pesticide Residues; D011722:Pyrethrins; D018035:Receptors, Odorant; D012724:Sex Attractants; C017180:decamethrin
keywords: Behavior; Crop pest; Detoxification; Hormesis; Olfaction; Sublethal pesticide doses