Widespread resistance of pollen beetles to pyrethroids in Czechia with no evidence for kdr mutation

Hovorka, Tomáš; Kocourek, F.; Horská, Tereza; Stará, Jitka

doi:10.1016/j.cropro.2021.105648

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…Additionally, several subpopulations with reduced susceptibility to thiacloprid were identified in the Czech Republic two years later (Spitzer et al 2020). And according to Hovorka et al (2021) only 43.2 % of analysed Czechia populations were found to be highly susceptible to thiacloprid in the years 2017−2020. These findings are in accordance with our study which shows insensitivity loss for thiacloprid in Estonia.…”

Section: Discussionmentioning

confidence: 99%

“…Seidenglanz et al (2017) referred to their observation that cross-resistance may exist, although Zimmer et al (2011a) and Spitzer et al (2020) could see no cross-resistance between lambda-cyhalothrin and thiacloprid. However, according to Hovorka et al (2021) there is resistance between those active ingredients. These contrasting results could be caused by different environmental conditions during insecticide application, and different regional selective pressures in terms of insecticide application.…”

Section: Discussionmentioning

confidence: 99%

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Resistance developments in Estonia’s population of pollen beetles (Brassicogethes aeneus)

Kann

Koppel

Kaart

et al. 2021

AFSci

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A total of 111 local pollen beetle populations were collected from both winter and spring oilseed rape fields, in the main oilseed growing regions of Estonia between 2015−2019. The objective was to analyse the insecticide-susceptibility of the pollen beetle population (in the form of Brassicogethes aeneus). The pollen beetle samples were tested for sensitivity to lambda-cyhalothrin, thiacloprid, and chlorpyrifos. The efficacy of the tested insecticides varied considerably by region. We observed a clear decrease in susceptibility to lambda-cyhalothrin and thiacloprid, but sensitivity to chlorpyrifos remained stable throughout the period between 2015 and 2019. Amongst the tested samples in that period, a total of 3% were classified as susceptible to lambda-cyhalothrin, 18% as moderately resistant, 70% as resistant, and 7% as highly resistant. In the case of thiacloprid, 21% of the samples were highly susceptible to the insecticide, 39% were susceptible, and 41% had reduced levels of susceptibility to the insecticide. The information which was presented tended to confirm the ongoing evolution of insecticide resistance in the B. aeneus population in Estonia, while also highlighting the importance of data-based decisions when optimising insecticide resistance management in the field.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Resistance developments in Estonia’s population of pollen beetles (Brassicogethes aeneus)

Kann

Koppel

Kaart

et al. 2021

AFSci

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

Hovorka¹,

Saska²,

Stará³

et al. 2021

PLANT SOIL ENVIRON

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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.

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Widespread resistance of pollen beetles to pyrethroids in Czechia with no evidence for kdr mutation

Cited by 2 publications

References 28 publications

Resistance developments in Estonia’s population of pollen beetles (Brassicogethes aeneus)

Resistance developments in Estonia’s population of pollen beetles (Brassicogethes aeneus)

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

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