4.7 Article

Field evolved resistance to pyrethroids, neonicotinoids, organophosphates and macrolides in Rhopalosiphum padi (Linnaeus) and Sitobion avenae (Fabricius) from China

Journal

CHEMOSPHERE
Volume 269, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.128747

Keywords

Cross-resistance; Insecticides; Pyrethroids; Rhopalosiphum padi; Sitobion avenae; Toxicity difference

Funding

  1. National Key Research and Development Program of China [2016YFD0300705, 2017YFD0201700, 2018YFD0200500, 31772165, 2018YFD0200406]
  2. China Agriculture Research System [CARS-3]
  3. SINOGRAIN II: Technological Innovation to Support Environmentally-Friendly Food Production and Food Safety Under a Changing Climate-Opportunities and Challenges for Norway-China Cooperation [CHN-17/0019]
  4. Technology Innovation and Key Cultivation Projects of Xinjiang Academy of Agricultural Sciences [xjkcpy-003]

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The study showed that Rhopalosiphum padi is more sensitive to insecticides compared to Sitobion avenae. Some aphid populations displayed high resistance to certain insecticides, while most populations had low resistance to neonicotinoids. Positive correlations were found between resistance to beta-cypermethrin and bifenthrin, as well as between bifenthrin and omethoate for the two aphid species. Similarly, significant correlations were detected between resistance to beta-cypermethrin and avermectin for Rhopalosiphum padi.
Rhopalosiphum padi (Linnaeus) and Sitobion avenae (Fabricius) are the predominant pests coexisting on wheat plants. In this study, the susceptibilities of 29 R. padi and 30 S. avenae populations from 15 provinces in China to pyrethroids (beta-cypermethrin and bifenthrin), neonicotinoids (imidacloprid and thiamethoxam), organophosphates (omethoate and chlorpyrifos) and macrolides (avermectin) were determined during 2018-2019. The median lethal insecticide concentrations (LC50) indicated that R. padi was more sensitive than S. avenae to most of the insecticides. Monitor results showed that most wheat aphid populations were moderately resistant to pyrethroids. Two R. padi populations were highly resistant to beta-cypermethrin with 127.3-fold and 442.8-fold resistance ratio (RR), and two were highly resistant to bifenthrin (RR of 293.9 and 320.6, respectively). One S. avenae population was highly resistant to beta-cypermethrin (RR of 136.8) and one was highly resistant to bifenthrin (RR of 313.4). All populations of two wheat aphids exhibited low to moderate resistance to neonicotinoids (RR < 100). But over half populations were sensitive or exhibited low resistance to organophosphates and macrolides. The pair-wise correlation coefficients for the insecticide LC50 revealed a positive correlation between beta-cypermethrin and bifenthrin resistance, as well as between the resistance to bifenthrin and omethoate for the two-aphid species. Similarly, significant correlations were detected between the resistance to beta-cypermethrin and avermectin for R. padi. These results may be relevant for developing effective insecticide management strategies that prevent or delay the development of resistance among wheat aphids. (C) 2020 Elsevier Ltd. All rights reserved.

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