Field survey of ryanodine receptor mutations (G4946E and I4790K) and their effects on biotic performance in the diamondback moth

Megumi Fukada; Yuki Itagaki; Atsuko Nagayoshi; Shoji Sonoda

doi:10.1584/jpestics.D20-011

Field survey of ryanodine receptor mutations (G4946E and I4790K) and their effects on biotic performance in the diamondback moth

J Pestic Sci. 2020 May 20;45(2):114-118. doi: 10.1584/jpestics.D20-011.

Authors

Megumi Fukada¹, Yuki Itagaki¹, Atsuko Nagayoshi¹, Shoji Sonoda¹

Affiliation

¹ School of Agriculture, Utsunomiya University, Utsunomiya, Tochigi 321-8505, Japan.

Abstract

This study examined changes in the proportions of ryanodine receptor mutations (G4946E and I4790K) for Plutella xylostella populations in the field. Results show that the proportion of G4946E decreased during the survey years without diamide application and that insects with I4790K were observed less frequently during the survey period. This study also examined the biotic performances of diamide-resistant P. xylostella strains. The results show that the diamide-resistant strains exhibited hatchability, larval development, and fecundity equivalent to those of diamide-susceptible strains.

Keywords: Plutella xylostella; cyantraniliprole; diamide; fitness cost; insecticide resistance.

© Pesticide Science Society of Japan 2020. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) License (https://creativecommons.org/licenses/by-nc-nd/4.0/).