当前位置： SCI文献检索 > PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY期刊下所有文献 > Reduced neuronal sensitivity and susceptibility of the fall armyworm, Spodoptera frugiperda, to pyrethroids in the absence of known knockdown mutations.

Reduced neuronal sensitivity and susceptibility of the fall armyworm, Spodoptera frugiperda, to pyrethroids in the absence of known knockdown mutations.

Abstract：

:Neurophysiological recordings were employed to quantify neuronal sensitivity to neurotoxic insecticides and assessed toxicity across field and laboratory fall armyworm (FAW) populations. Topical toxicity resistance ratios (RR) in field-collected FAW was 767-fold compared to laboratory strains and, importantly, a 1750-fold reduction in potency was observed for λ-cyhalothrin in neurophysiological assays. Field collected FAW were found to have a RR of 12 to chlorpyrifos when compared to the susceptible strain and was 8-fold less sensitive in neurophysiological assays. Surprisingly, there were no point mutations identified in the voltage-gated sodium channel known to cause pyrethroid resistance. For acetylcholinesterase, FAW had more than 80% of their nucleotide sequences consistent with A201 and F290 of the susceptible strains although 60% of the tested population was heterozygous for the G227A mutation. These data indicate that point mutations did not contribute to the high level of pyrethroid resistance and nerve insensitivity in this population of field collected FAW. Additionally, these data suggest the kdr phenotype only explains a portion of the heritable variation in FAW resistance and indicates kdr is not the only predictor of high pyrethroid resistance. Phenotypic assays, such as toxicity bioassays or neurophysiological recordings, using field-collected populations are necessary to reliably predict resistant phenotypes and product failures.

journal_name

Pestic Biochem Physiol

journal_title

Pesticide biochemistry and physiology

authors

McComic SE,Rault LC,Anderson TD,Swale DR

doi

10.1016/j.pestbp.2020.104652

subject

Has Abstract

pub_date

2020-10-01 00:00:00

pages

104652

eissn

0048-3575

issn

1095-9939

pii

S0048-3575(20)30147-4

journal_volume

169

pub_type

杂志文章

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