Effects of sub-nanogram doses of acetamiprid, dimethoate, flupyradifurone and sulfoxaflor on courtship, mating and olfactory host finding of the parasitic wasp <i>Lariophagus distinguendus</i>

URN to cite this document:

urn:nbn:de:bvb:355-epub-555730 Copy

DOI to cite this document:

10.5283/epub.55573 Copy

Ruther, Joachim

License: Creative Commons Attribution Non-commercial No Derivatives 4.0 PDF Early View (2MB)

Date of publication of this fulltext: 19 Feb 2024 13:33

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Details

Item type:	Article
Open Access Type:	DEAL (Wiley)
Journal or Publication Title:	ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA
Publisher:	Wiley
Date:	2 April 2024
Institutions:	Biology, Preclinical Medicine > Institut für Zoologie > Chemische Ökologie (Prof. Dr. Joachim Ruther)
Identification Number:	Value Type 10.1111/eea.13444 DOI
Keywords:	chemical communication, ecosystem service, host finding, Hymenoptera, insecticides, natural enemies, non-target species, olfaction, Pteromalidae, sexual communication, sublethal effects, wing fannin
Dewey Decimal Classification:	500 Science > 570 Life sciences 500 Science > 590 Zoological sciences
Status:	Published
Refereed:	Yes, this version has been refereed
Created at the University of Regensburg:	Yes
Item ID:	55573

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Abstract

Continued use and development of new insecticides are seen as a necessary part of modern agriculture, but insecticides, even at sublethal levels, may also affect beneficial non-target species, such as pollinators, predators, and parasitic wasps. Here, we studied sublethal effects of four insecticides – acetamiprid, dimethoate, flupyradifurone, and sulfoxaflor – all targeting cholinergic neurons ...

Abstract

Continued use and development of new insecticides are seen as a necessary part of modern agriculture, but insecticides, even at sublethal levels, may also affect beneficial non-target species, such as pollinators, predators, and parasitic wasps. Here, we studied sublethal effects of four insecticides – acetamiprid, dimethoate, flupyradifurone, and sulfoxaflor – all targeting cholinergic neurons in insects, on sexual communication and olfactory host finding in the parasitic wasp Lariophagus distinguendus (Förster) (Hymenoptera: Pteromalidae). We found that all four insecticides reduced, at least at one of the tested sublethal doses, pheromone-mediated courtship behaviour (wing fanning) in males and the mating frequency of treated wasps. Treated females no longer preferred host-associated kairomones. This suggests that the olfactory sense of the wasps is hampered by sublethal insecticide doses. The lowest bioactive doses tested in the bioassays were 0.021 ng for sulfoxaflor and 0.105 ng for acetamiprid, dimethoate, and flupyradifurone. These low amounts are field realistic and might be taken up by the wasps, e.g., by feeding contaminated plant nectar. Exposure to these compounds likely compromises the important ecosystem service provided by parasitic wasps as natural enemies in terrestrial ecosystems.

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Metadata last modified: 01 Oct 2024 07:08

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