Comparative observations on the activity of purethroids against some susceptible and resistant stored products beetles

Carter, S.W.; Chadwick, P. R.; Wickham, John C.

doi:10.1016/0022-474x(75)90022-3

Cited by 23 publications

(6 citation statements)

References 17 publications

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“…The first detection of resistance was reported in a laboratory S. oryzae strain (CSO231) derived from a field strain collected in Western Australia, with resistance at 6x that of a susceptible reference strain (Champ and Dyte, 1976). Carter et al (1975) then showed no resistance to fenitrothion in the CSO231 strain when applying another testing method of the dusted grain with fenitrothion instead of the impregnated paper method previously used by Champ and Dyte. Resistance then was detected in 53% and 73% of field strains in Queensland with low level of resistance, from 2 to 4 times compared to the reference susceptible strain (Collins and Wilson, 1986).…”

Section: Resistance To Organophosphatesmentioning

confidence: 86%

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Genetics of phosphine resistance in the rice weevil Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

Nguyen¹

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The rice weevil, Sitophilus oryzae (Linnaeus) is a cosmopolitan insect pest that can cause severe damage to stored grain with regard to both quality (loss of nutritional and aesthetic value) and quantity (loss of grain weight). Heavy reliance on the fumigant phosphine to disinfest stored products has led to resistance to phosphine in many insect species including S. oryzae. The frequency and level of phosphine resistance in S. oryzae has increased in the last fifty years in Asian and Africa countries and recently in Australia as well. A strongly phosphine resistant strain of S. oryzae was first detected in 2009 in Australia. I have determined the strong resistance trait in this strain to be incompletely recessive, autosomal and controlled by at least two major genes. The weakly resistant Australian strain shares a common resistance factor with the strongly resistant strain (So_rph1), which is responsible for weak resistance. I also compared the resistance trait of the Australian strain to that of collected from Vietnam and China. Complementation analysis revealed a shared genetic mechanism of phosphine resistance between the three strains that I tested.I then identified and sequenced the genes conferring phosphine resistance in this species.This process began with simply sequencing transcripts of the two genes known to be responsible for phosphine resistance in Rhyzopertha dominica and Tribolium castaneum (rph1/tc_rph1 and rph2/tc_rph2). rph2/tc_rph2 had been published and was known to encode the metabolic enzyme, dihydrolipoamide dehydrogenase (DLD). Variants of DLD (So_rph2) also cause strong resistance in S. oryzae when interacting with resistance variants of So_rph1. Therefore, rph2/DLD is responsible for strong resistance in each of the three species. A specific substitution mutation (N505T) in DLD is likely responsible for phosphine resistance as it is found in all strongly resistant strains of S. oryzae from Australia, Vietnam and China. A fitness cost associated with the resistance allele of So_rph2 was observed in the absence of selection in populations derive from the F 1 progeny between a strongly resistant strain and strains lacking a resistance allele at So_rph2.As DLD is one of three subunits (E1, E2, E3) of α-ketoacid dehydrogenase complexes, Ihypothesized that suppression of the activity of subunits other than DLD might also result in resistance to phosphine. Thiamine pyrophosphate is critical cofactor of the E1 subunit and is required by very few other enzymes. I reasoned that insects cultured on a diet of white rice, which is deficient in thiamine, would experience inhibition of the activity of E1. I expected to observe the change in response to phosphine in both the susceptible and ii resistance strains of S. oryzae when fed on white rice diet compared with the thiamine containing diet of whole grain (brown rice or whole wheat). Against my expectation, I found no significant affect of a thiamine deficient diet toward phosphine resistance in S. oryzae.A diet of white rice, however, did ...

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Section: Resistance To Organophosphatesmentioning

confidence: 86%

“…Surprisingly, Carter et al (1975) also used the same strain from Australia but found no resistance to most tested pyrethroids such as pyrethrins (-/+PB), bioresmethrin (-/+PB), cismethrin (-/+PB). The LC 50s of the susceptible strain were even higher than the values of the resistant strain.…”

Section: Resistance To Synthetic Pyrethroidsmentioning

confidence: 99%

Genetics of phosphine resistance in the rice weevil Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

Nguyen¹

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“…Effectiveness of natural pyrethrins with and without piperonyl butoxide has been well documented for major stored‐product beetles12–14 and mites 15. Although natural pyrethrins have been evaluated against L. bostrychophila and L. entomophila on treated concrete surfaces,16 this paper reports for the first time the potential of PB‐synergised pyrethrins as a grain protectant and as a disinfestant against psocid pests of stored products.…”

Section: Discussionmentioning

confidence: 99%

“…A formulation of piperonyl butoxide (PB)‐synergised natural pyrethrins (pyrethrin:PB ratio 1:4) has recently been registered in Australia for use against a range of agricultural pests including stored‐grain beetles, but the current registration limits its use to application as a space spray and to fabric treatment of buildings and storage structures. Information on the effectiveness of natural pyrethrins alone and of pyrethrins synergised with PB against major stored‐product beetles12–14 and mites15 is available in the literature. However, information on the efficacy of pyrethrins against psocid pests of stored grain is limited to an evaluation of the performance of pyrethrins alone as a surface treatment against L. bostrychophila and L. entomophila 16.…”

Section: Introductionmentioning

confidence: 99%

Potential of piperonyl butoxide‐synergised pyrethrins against psocids (Psocoptera: Liposcelididae) for stored‐grain protection

Nayak

2009

Pest Management Science

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“…These data were found to be similar to data reported in the literature. Carter et al (1975) found the LC9S of mal dis on mixed with grain was 1. 71 ppm and McCallum Deighton (1978) found the minimum effective dose (M.E.D.-the lowest concentration which kills all adults when continuously exposed to the treated grain) was 1-3 ppm.…”

Section: Distribution Of Dust Through Grainmentioning

confidence: 97%

A laboratory evaluation of pirimiphos methyl and difluron admixed with wheat against the granary weevil

Waller

1982

New Zealand Journal of Agricultural Research

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were tested against the granary weevIl (Sltophtll~S granartliS (1:.». Pmmlphos methyl, LC95 0.75 ppm, was con sidera~ly more a~tIve. than maldlso.n, LC95 3.4 ppm. As difluron acts by inhibiting c.utIcle .r~rmatIon, It was n?t active against adult weevils. Insecticide concentrations glvmg a 95%. r~d~ctlOn in the Fl generation population over the control treatm~n~s,. were: pmmlphos methyl 0.5 ppm, difluron 1.9 ppm, and maldison 2.0 ppm. Pmf!1lphos methyl was the most cost effective compound tested. A method for assessmg the evenness of distribution of insecticide dust through grain is also presented.

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Comparative observations on the activity of purethroids against some susceptible and resistant stored products beetles

Cited by 23 publications

References 17 publications

Genetics of phosphine resistance in the rice weevil Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

Genetics of phosphine resistance in the rice weevil Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

Potential of piperonyl butoxide‐synergised pyrethrins against psocids (Psocoptera: Liposcelididae) for stored‐grain protection

A laboratory evaluation of pirimiphos methyl and difluron admixed with wheat against the granary weevil

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