Spatiotemporal distancing of crops reduces pest pressure while maintaining conservation biocontrol in oilseed rape.

Autor: Sulg S; Chair of Plant Health, Estonian University of Life Sciences, Tartu, Estonia., Kovács G; Chair of Plant Health, Estonian University of Life Sciences, Tartu, Estonia., Willow J; Chair of Plant Health, Estonian University of Life Sciences, Tartu, Estonia.; Department of Plants and Crops, Ghent University, Ghent, Belgium., Kaasik R; Chair of Plant Health, Estonian University of Life Sciences, Tartu, Estonia., Smagghe G; Department of Plants and Crops, Ghent University, Ghent, Belgium., Lövei GL; Department of Agroecology, Aarhus University, Slagelse, Denmark.; ELKH-DE Anthropocene Ecology Research Group, University of Debrecen, Debrecen, Hungary.; Department of Zoology & Ecology, Hungarian University of Agricultural and Life Sciences, Godollo, Hungary., Veromann E; Chair of Plant Health, Estonian University of Life Sciences, Tartu, Estonia.
Jazyk: angličtina
Zdroj: Pest management science [Pest Manag Sci] 2024 May; Vol. 80 (5), pp. 2250-2259. Date of Electronic Publication: 2023 Feb 18.
DOI: 10.1002/ps.7391
Abstrakt: Background: Agricultural landscapes provide resources for arthropod pests as well as their natural enemies. To develop integrated pest management (IPM) practices, it is important to understand how spatiotemporal location influences crop colonization and damage severity. We performed a 3-year (2016-2018) field experiment in winter oilseed rape (OSR, Brassica napus) fields in Estonia, where half of the fields were within 500 m of the location of the previous year's winter OSR field and half were outside this zone. We investigated how distance from the previous year's OSR crop influences the infestation and parasitism rates of two of its most important pests: the pollen beetle (Brassicogethes aeneus) and the cabbage seed weevil (Ceutorhynchus obstrictus).
Results: When the distance from the previous year's OSR crop was >500 m, we recorded significantly reduced pest pressure by both B. aeneus and C. obstrictus in the study fields. Biocontrol of both pests, provided by parasitic wasps, was high in each study year and commonly not affected by distance. Mean parasitism rates of B. aeneus were >31%, occasionally reaching >70%; for C. obstrictus, mean parasitism was >46%, reaching up to 79%, thereby providing effective biocontrol for both pest species.
Conclusion: Spatiotemporal separation of OSR fields can reduce pest pressure without resulting in reduced parasitism of OSR pests. This supports a spatiotemporal field separation concept as an effective and sustainable technique for IPM in OSR. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
(© 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.)
Databáze: MEDLINE
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