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

Yasuhiko Konno; Kiyoshi Domon

doi:10.1303/jjaez.42.30

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

Yasuhiko Konno, Kiyoshi Domon

AGR - Life Sciences

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	30-32
Number of pages	3
Journal	Japanese Journal of Applied Entomology and Zoology
Volume	42
Issue number	1
DOIs	https://doi.org/10.1303/jjaez.42.30
Publication status	Published - 1998

Keywords

Acetylcholinesterase
Carbamate
Oulema oryzae
Rice leaf beetle
Risistance

ASJC Scopus subject areas

Insect Science

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

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.",

keywords = "Acetylcholinesterase, Carbamate, Oulema oryzae, Rice leaf beetle, Risistance",

author = "Yasuhiko Konno and Kiyoshi Domon",

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T1 - Acetylcholinesterase sensitivity and carbamate insecticide resistance in rice leaf beetle, Oulema oryzae Kuwayama (Coleoptera

T2 - Chrysomelidae)

AU - Konno, Yasuhiko

AU - Domon, Kiyoshi

PY - 1998

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N2 - 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.

AB - 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.

KW - Acetylcholinesterase

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KW - Oulema oryzae

KW - Rice leaf beetle

KW - Risistance

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