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Updated: Jan 21, 2026

A Loop-mediated Isothermal Amplification LAMP Assay for Rapid Identification of Bemisia tabaci
Published on: October 29, 2018
Differential metabolism of imidacloprid and dinotefuran by Bemisia tabaci CYP6CM1 variants
Akira Hamada1, Gregory D Wahl2, Alexandre Nesterov2
1Agrochemicals Research Center, Mitsui Chemicals Agro, Inc., Mobara, Chiba 297-0017, Japan.
Abstract:
Imidacloprid has been used to control one of most serious pests, Bemisia tabaci. However, B. tabaci has developed imidacloprid resistance mainly by over-expressing CYP6CM1. It was reported that imidacloprid-resistant B. tabaci showed no or low level of cross-resistance against dinotefuran. Here, we expressed CYP6CM1 variants using Sf9/baculovirus and/or Drosophila S2 cells and showed that CYP6CM1 variants metabolized imidacloprid but not dinotefuran. In addition, we demonstrated that imidacloprid and pymetrozine competed for a CYP6CM1 variant more efficiently than dinotefuran, using a luminescent substrate competition assay. These results suggest that lack of metabolic activity of CYP6CM1 variants against dinotefuran caused no or low level of cross-resistance.
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