Insecticidal and residual effect of three pyrethroids against Sitophilus oryzae (L.) (Coleoptera: Curculionidae) on stored wheat

Athanassiou, Christos G.; Papagregoriou, Amalia S.; Buchelos, C. T.

doi:10.1016/s0022-474x(03)00025-0

Cited by 57 publications

(30 citation statements)

References 14 publications

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“…For example, exposing S. granarius insects from their laboratory population to treated filter paper for 48 h, Kljajić and Perić (2006) had found that 50% and 95% mortality of adults required cypermethrin application rates of 135 mg/m 2 and 732 mg/m 2 without the synergist piperonyl butoxide added. Collins (1990) had exposed a laboratory population of red flour beetles Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) to treated wheat grain for 26 days and measured cypermethrin toxicity of 0.34 mg/kg (LC 50 ) and 1.2 mg/kg (LC 95 ), while Athanassiou et al (2004) had tested residual efficacy of a cypermethrin isomer (alpha-cypermethrin) in wheat grain against rice weevils Sitophilus oryzae (L.) on 30-and 60-day old deposits after seven days of exposure and detected 33-50% efficacy of alpha-cypermethrin (0.25 mg/kg).…”

Section: Discussionmentioning

confidence: 99%

“…Several products have been registered in Serbia that are based on two organophosphate insecticides: malathion (EC-emulsifiable concentrate and DP-dustable powder) and pirimiphos-methyl (EC), and on deltamethrin as a single pyrethroid used in combination with piperonyl butoxide (EC). Cypermethrin, another pyrethroid known as an insecticide that is effective against many agricultural insect pests, has not been registered so far for application in storages and data on its efficacy against stored product insects are scarce (Collins, 1990;Kljajić & Perić, 2005;Athanassiou et al, 2004;MacBean, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Residual efficacy of cypermethrin and pirimiphos-methyl against Sitophilus granarius (L.) and Plodia interpunctella (Hübner) on concrete surface

2014

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SummaRyResidual activity of EC formulations of two insecticides, cypermethrin (combined with the synergist piperonyl butoxide) and pirimiphos-methyl, against Sitophilus granarius (L.) adults and Plodia interpunctella (Hübner) larvae was investigated on concrete surface. The experiment was run indoors at 16-24ºC temperature and 30-60% r.h. by applying water solutions of products based on cypermethrin (48 mg AI/m 2 ) and pirimiphos-methyl (750 mg AI/m 2 ) to concrete surface. Insect mortality was estimated after 2, 7 and 14 days of insect exposure to treated concrete and 7 days of recovery on untreated coarse wheat meal at 24-26ºC and 55-65% r.h in the laboratory.High efficacy of cypermethrin against S. granarius adults (87-100%) and P. interpunctella larvae (84-100%) was detected after 14 days of exposure to all deposits on concrete surface. Pirimiphos-methyl achieved maximum efficacy (100%) in all treatments of S. granarius adults and P. interpunctella larvae after 2 and 14 days of exposure, regardless of deposit age. After 7 days of recovery, the efficacy of both insecticides mostly increased, especially of cypermethrin, up to around 50% after two days of exposure, up to 24-45% after seven days of exposure and up to 15% after 14 days of exposure. The results show that the EC formulations of cypermethrin and especially of pirimiphos-methyl were highly effective in controlling S. granarius adults and P. interpunctella larvae over a period of 60 days following application to concrete surface.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Residual efficacy of cypermethrin and pirimiphos-methyl against Sitophilus granarius (L.) and Plodia interpunctella (Hübner) on concrete surface

2014

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“…The strain selected for deltamethrin resistance was also resistant to the following compounds plus PB: permethrin (392x), bioresmethrin (292x), fenvalerate (192x), cypermethrin (1100x). A study of Athanassiou et al (2004) concluded that deltamethrin and cyfluthrin were more toxic than cypermethrin when used to control S. oryzae, however none of the treatments caused 100% mortality of this species. Many studies compared the responses of Coleopteran pests to bioresmethrin, resmethrin, deltamethrin, showing that R. dominica and T. castaneum were more sensitive to these pyrethroids than S. oryzae (Samson and Parker, 1989, Arthur, 1992, Arthur, 1994.…”

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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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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“…Many pesticides are effective at relatively low doses and may offer long-term protection, ranging from 6 to 12 months (Athanassiou et al, 2004). However, some of these pesticides, especially organophosphates have high toxicity to mammals, and the residues left can cause health problems because they are conventional neurotoxins that affect the human nervous system (Athanassiou et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Resistance of Cowpea Genotypes to Zabrotes subfasciatus (Boheman, 1833) (Coleoptera: Chrysomelidae: Bruchinae)

Toledo¹,

Fontes²,

Barbosa³

et al. 2013

JAS

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Cowpea (Vigna unguiculata (L.) Walp.) when stored is mainly attacked by bruchid Coleopterans. The control of these pests is done primarily through chemicals, however, with problems related to the selection of resistant insects, alternative forms of control are searched. Seeking an alternative control, the objective this work was to evaluate the resistance of cowpea genotypes to the attack of Z. subfasciatus. In the first selection of genotypes were evaluated 35 cowpea genotypes, being observed the variables: number of eggs, number of insects emerged and weight loss (%). In this first selection of cowpea were selected 10 genotypes. In the second selection of genotypes, the 10 most resistant from the first selection were used, but with eight repetitions per genotype, besides evaluating the egg viability (%) and instantaneous rate of population growth. The cowpea genotypes showed significant differences for resistance to attack by Z. subfasciatus. The most resistant to Z. subfasciatus were BRS Tracuateua, 31 MNC03-720C-20, 26 MNC00-553D-8-1-2-2 and 37 MNC05-832B-234-5.

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Insecticidal and residual effect of three pyrethroids against Sitophilus oryzae (L.) (Coleoptera: Curculionidae) on stored wheat

Cited by 57 publications

References 14 publications

Residual efficacy of cypermethrin and pirimiphos-methyl against Sitophilus granarius (L.) and Plodia interpunctella (Hübner) on concrete surface

Residual efficacy of cypermethrin and pirimiphos-methyl against Sitophilus granarius (L.) and Plodia interpunctella (Hübner) on concrete surface

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

Resistance of Cowpea Genotypes to Zabrotes subfasciatus (Boheman, 1833) (Coleoptera: Chrysomelidae: Bruchinae)

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