Acetylcholinesterase sensitivity and carbamate insecticide resistance in rice leaf beetle, Oulema oryzae Kuwayama (Coleoptera: Chrysomelidae)

Yasuhiko Konno, Kiyoshi Domon

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We investigated the LD50 values and acetylcholinesterase (AChE) sensitivity to carbamate insecticides in the rice leaf beetle, Oulema oryzae Kuwayama. Resistant populations showed high levels of resistance to PHC (> 28,000 ×), BPMC (135 × to 151 ×) and benfuracarb (21 × to 29 ×). The median inhibition concentration (I50) of carbamates to AChE in resistant populations was clearly greater than in susceptible populations. The acetylcholinesterase insensitivity ratio (IR) values ranged from 634 × (benfuracarb) to > 20,000 × (PHC and BPMC). Therefore, insensitivity to AChE is an important mechanism in carbamate resistance in the rice leaf beetle.

Original languageEnglish
Pages (from-to)30-32
Number of pages3
JournalJapanese Journal of Applied Entomology and Zoology
Volume42
Issue number1
DOIs
Publication statusPublished - 1998

Keywords

  • Acetylcholinesterase
  • Carbamate
  • Oulema oryzae
  • Rice leaf beetle
  • Risistance

ASJC Scopus subject areas

  • Insect Science

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