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Journal articles
Behavioral and metabolic effects of sublethal doses of two insecticides, chlorpyrifos and methomyl, in the Egyptian cotton leafworm, Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae)
Abstract : Insecticides have long been used as the main method in limiting agricultural pests, but their widespread use has resulted in environmental pollution, development of resistances, and biodiversity reduction. The effects of insecticides at low residual doses on both the targeted crop pest species and beneficial insects have become a major concern. In particular, these low doses can induce unexpected positive (hormetic) effects on pest insects, such as surges in population growth exceeding what would have been observed without pesticide application. Methomyl and chlorpyrifos are two insecticides commonly used to control the population levels of the cotton leafworm Spodoptera littoralis, a major pest moth. The aim of the present study was to examine the effects of sublethal doses of these two pesticides, known to present a residual activity and persistence in the environment, on the moth physiology. Using a metabolomic approach, we showed that sublethal doses of methomyl and chlorpyrifos have a systemic effect on the treated insects. We also demonstrated a behavioral disruption of S. littoralis larvae exposed to sublethal doses of methomyl, whereas no effects were observed for the same doses of chlorpyrifos. Interestingly, we highlighted that sublethal doses of both pesticides did not induce a change in acetylcholinesterase activity in head of exposed larvae
Keywords :
general
Insect behavior
Insecticide
Methomyl
Atmospheric Protection
Air Quality Control
Air Pollution
Chlorpyrifos
Crop pest
Sublethal doses
Spodoptera littoralis
Environment
Environmental Health
Environmental Chemistry
Ecotoxicology
Water Management
Aquatic Pollution
Olfaction
Water Pollution Control
Waste Water Technology
Cited literature [63 references]
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01231427
Contributor : Laurent Jonchère <>
Submitted on : Tuesday, November 24, 2015 - 9:59:37 AM
Last modification on : Thursday, July 9, 2020 - 5:34:03 PM
Long-term archiving on: : Friday, April 28, 2017 - 10:12:49 PM
Contributor : Laurent Jonchère <>
Submitted on : Tuesday, November 24, 2015 - 9:59:37 AM
Last modification on : Thursday, July 9, 2020 - 5:34:03 PM
Long-term archiving on: : Friday, April 28, 2017 - 10:12:49 PM
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