Attractiveness of oilseed rape cultivars to Brassicogethes aeneus and Ceutorhynchus obstrictus as a potential control strategy

Tomáš Hovorka, Pavel Saska, Jitka Stará and František Kocourek
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Tomáš Hovorka: Department of Plant Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
Pavel Saska: Department of Function of Invertebrate and Plant Biodiversity in Agrosystems, Crop Research Institute, Prague, Czech Republic
Jitka Stará: Department of Integrated Crop Protection against Pests, Crop Research Institute, Prague, Czech Republic
František Kocourek: Department of Integrated Crop Protection against Pests, Crop Research Institute, Prague, Czech Republic

Plant, Soil and Environment, 2021, vol. 67, issue 10, 608-615

Abstract: The abundances of two pests, pollen beetle (Brassicogethes aeneus (Fabricius, 1775)) and cabbage seed weevil (Ceutorhynchus obstrictus (Marsham, 1802)), were measured before flowering and in the full bloom of oilseed rape cultivars with different phenologies (two yellow-flowering: DK Exssence (the earliest), DK Sensei (the latest) and one white-flowering in time between yellow-flowering cultivars), and the differences in their abundance in the selected cultivars were determined in plot experiments during 2015-2018. No significant differences in pollen beetle and cabbage seed weevil occurrence were observed between the cultivars in the pre-flowering period, but during flowering, the two yellow-flowering cultivars were more attractive than the white-flowering cultivar for both pests. In the white-flowering cultivar, 57% and 69% reductions in the pollen beetle and cabbage seed weevil populations, respectively, were found relative to the two with yellow flowers. Thus, the use of white-flowering cultivar (less attractive, later flowering) as the main crop and the yellow-flowering cultivar (more attractive, earlier flowering) at field edges, with the width of the one-track line, could serve as a strategy to manage oilseed rape pests during flowering. This control strategy which combines more and less attractive oilseed rape cultivars may contribute to a reduction in the use of pesticides and their negative impact on the environment.

Keywords: Brassica napus L.; push-pull strategy; pest management; insecticide; trap crops (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:67:y:2021:i:10:id:367-2021-pse

DOI: 10.17221/367/2021-PSE

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