期刊
AGRICULTURE-BASEL
卷 11, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/agriculture11060539
关键词
parasitism behavior; aphid-parasitoid interaction; insecticides; pyrethroids; sub-lethal effects
类别
资金
- Iniciativa Cientifica Milenio from the Chilean Ministry of Economy [NC120027]
- Millennium Nucleus Centre in Molecular Ecology and Evolutionary Applications in Agroecosystems
- FONDECYT [1130483, 1170943]
The use of synthetic insecticides can have undesirable effects on natural enemies and insecticide resistance, with neurotoxic insecticide residues interfering with the chemical cues used by natural enemies. This study found that sub-lethal concentrations of pyrethroid insecticides significantly disturb the foraging behavior of aphid parasitoid wasps, potentially leading to failures in biological control, especially with insecticide-resistant pest populations.
The use of synthetic insecticides may cause failures in the biological control of insect pests due to undesired side effects on natural enemies and the rapid evolution of insecticide resistance in agroecosystems. Residues of neurotoxic insecticides can interfere with the recognition of chemical cues used by natural enemies to find pests. We investigated the effects of sub-lethal concentrations of the pyrethroid lambda-cyhalothrin on the interaction between the aphid parasitoid wasp Aphidius colemani and the peach potato aphid Myzus persicae. We studied changes in host-searching and oviposition behavior through laboratory bioassays when susceptible and kdr-resistant aphids are offered to parasitoid females, evaluating the effect of applying insecticides on the interacting species. The patch residence time, exploration, oviposition, and grooming were significantly disturbed when the parasitoids were offered resistant aphids sprayed with sub-lethal doses, but not when the parasitoids were offered susceptible M. persicae exposed to sub-lethal doses. We discuss how the effects of insecticides on parasitism behavior may result in failures of biological control if natural enemy populations are not adequately managed, particularly for the management of insecticide-resistant pest populations. Efforts to introduce biological control in integrated pest management (IPM) programs are also discussed.
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