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Susceptibility of Cydalima perspectalis (Lepidoptera: Crambidae) larvae to some reduced-risk insecticides in laboratory bioassays

Author

Listed:
  • Fatemeh Moradi Afrapoli

    (Department of Plant Protection, Sari Agricultural Sciences and Natural Resources University, Sari, Iran)

  • Mahmoud Mohammadi Sharif

    (Department of Plant Protection, Sari Agricultural Sciences and Natural Resources University, Sari, Iran)

  • Hasan Barimani Varandi

    (Research Division of Natural Resources, Mazandaran Agricultural and Natural Resources Research and Education Center, AREEO, Sari, Iran)

  • Masoumeh Shayanmehr

    (Department of Plant Protection, Sari Agricultural Sciences and Natural Resources University, Sari, Iran)

Abstract

Box tree moth (BTM) Cydalima perspectalis (Walker, 1859) is the most harmful pest of different boxwood species in Europe and Asia including Caspian boxwood Buxus hyrcana in the Hyrcanian forests of Iran. Accessible and effective eco-friendly insecticides are required for the pest control. Thus, susceptibility of 2nd and 4th instar larvae of BTM to commercial formulation of Bacillus thuringiensis (Bt), two plant extract formulations, Bio1® and Matrine®, and three insect growth regulator (IGR) insecticides, chlorfluazuron, chromafenozide and diflubenzuron were investigated in laboratory bioassay. Except for diflubenzuron, significant mortality of both instar larvae was observed. At the endpoint of the experiments (96 h), 75.2-90% of second and 80-85% of fourth instar larvae had already died, as a result of feeding on leaves treated with the highest concentration of the insecticides. Furthermore, based on Probit analysis, Matrine® exhibited the highest efficiency (lethal concentration LC50 = 2.87 μL.L-1) on 2nd instar larvae and followed by Bio1® (8.07 μL.L-1), chlorfluazuron (173.3 μL.L-1) and Bt (326.3 mg.L-1). The LC50 of Matrine® and Bt for 4th instar larvae were 1.75 μL.L-1 and 335.8 mg.L-1, respectively. Our study revealed that Matrine® and chromafenozide could be alternatively used against BTM in situations where there is a permission and need to use insecticides.

Suggested Citation

  • Fatemeh Moradi Afrapoli & Mahmoud Mohammadi Sharif & Hasan Barimani Varandi & Masoumeh Shayanmehr, 2022. "Susceptibility of Cydalima perspectalis (Lepidoptera: Crambidae) larvae to some reduced-risk insecticides in laboratory bioassays," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 68(7), pages 253-262.
    • Handle: RePEc:caa:jnljfs:v:68:y:2022:i:7:id:67-2022-jfs
    DOI: 10.17221/67/2022-JFS
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    References listed on IDEAS

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    1. Suppo, Christelle & Bras, Audrey & Robinet, Christelle, 2020. "A temperature- and photoperiod-driven model reveals complex temporal population dynamics of the invasive box tree moth in Europe," Ecological Modelling, Elsevier, vol. 432(C).
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