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Chemosphere

Title:		Partial compensation of the sublethal effect of deltamethrin on the sex pheromonal communication of Trichogramma brassicae
Author(s):		Delpuech JM; Legallet B; Fouillet P;
Address:		"Laboratoire de Biometrie et Biologie Evolutive, CNRS umr 5558, Universite Claude Bernard Lyon 1, Villeurbanne, France. delpuech@biomserv.univ-lyon1.fr"
Journal Title:		Chemosphere
Year:		2001
Volume:		42
Issue:		8
Page Number:		985 - 991
DOI:		10.1016/s0045-6535(00)00110-7
ISSN/ISBN:		0045-6535 (Print) 0045-6535 (Linking)
Abstract:		"Pyrethroid insecticides are widely used and lead to a sizable environmental pollution that could interfere with the population biology of insects. Trichogramma is a beneficial insect used in biological control and which natural populations contribute to the control of Lepidopterus pests. In this work, we determined the effect of a sublethal dose of deltamethrin on the sex pheromonal communication of Trichogramma. The dose used (LD 0.1) induces no detectable mortality (the theoretical mortality is only one insect over 1000) and can be a good representation of contamination by this insecticide from environmental pollution. The insecticide was shown to have opposite effects on the sex pheromonal communication of Trichogramma, depending on which sex was exposed (Delpuech, J.M., Legallet, B., Terrier, O., Fouillet, P., 1999. Chemosphere 38, 729-739). We show that, when both sexes are simultaneously exposed to the insecticide, this effect is only partially neutralized. The mean response of treated males responding to the sex pheromone from treated females is not significantly different from that of controls, but the kinetics of their response is not the same. When both sexes are treated, the response of males to the sex pheromone is lower at the beginning but their response does not decrease during time contrary to controls and becomes finally higher than that of controls. Therefore, the sublethal effect of deltamethrin in the field can be either advantageous or disadvantageous depending on the difficulty in finding females and their scarcity"
Keywords:		"*Animal Communication Animals Behavior, Animal/drug effects Dose-Response Relationship, Drug Female Hymenoptera/*physiology Insecticides/*adverse effects Kinetics Male Nitriles Pyrethrins/*adverse effects *Sex Attractants;"
Notes:		"MedlineDelpuech, J M Legallet, B Fouillet, P eng Research Support, Non-U.S. Gov't England 2001/03/29 Chemosphere. 2001 Mar; 42(8):985-91. doi: 10.1016/s0045-6535(00)00110-7"