Resistance to Grain-Protectant Insecticides in Coleopterous Pests of Stored Cereals in Queensland, Australia

Collins, Patrick J.; Lambkin, T.M.; Bridgeman, B.; Pulvirenti, C.

doi:10.1093/jee/86.2.239

Cited by 82 publications

(48 citation statements)

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“…This integration of these two methods of insect-pest control in a storage environment is important, especially in cases where the pests have already acquired resistance to most insecticides used in this ecosystem (Arthur et al 1988, Collins 1990, Collins et al 1993.…”

Section: Discussionmentioning

confidence: 99%

“…However, due to the development of resistance in many pests to the majority of the insecticides (organophosphates and pyrethroids) commonly used for their control (Collins et al 1993, Guedes et al 1996, Lorini & Galley 1999, insecticide use is becoming increasingly unviable (Arthur 1996). Because few insecticides are registered for controlling stored grain pests and the registration of new products requires a long time and at a high cost (White & Leesch 1996), alternative methods such as integration of natural enemies and insecticides need to be developed (King & Nordlund 1992).…”

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confidence: 99%

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Insecticide selectivity to the parasitic mite Acarophenax lacunatus (Cross & Krantz) (Prostigmata: Acarophenacidae) on Rhyzopertha dominica (Fabr.) (Coleoptera: Bostrichidae)

Gonçalves¹,

Faroni²,

Guedes³

et al. 2004

Neotrop. Entomol.

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Seletividade de Inseticidas Para o Ácaro Parasita Acarophenax lacunatus (Cross & Krantz) (Prostigmata: Acarophenacidae) em Rhyzopertha dominica (Fabr.) (Coleoptera: Bostrichidae) RESUMO -Diante da presença de inimigos naturais em massas de grãos armazenados e a necessidade de se buscar alternativas de controle de pragas, avaliou-se o efeito de inseticidas sobre o ácaro Acarophenax lacunatus (Cross & Krantz), um parasita de ovos de Rhyzopertha dominica (Fabr.). Os inseticidas bifentrina, deltametrina, pirimifós metílico e fenitrotiom foram testados a 0,4; 0,5; 0,8 e 10 ppm. As unidades experimentais consistiram de placas de Petri contendo grãos de trigo, infestados com 25 adultos de R. dominica. Sete dias após a infestação, foram inoculados três ácaros em cada placa, sendo utilizadas quatro repetições por tratamento. O número de adultos de R. dominica, a perda de matéria seca dos grãos e a taxa instantânea de crescimento (r i ) de A. lacunatus foram menores no tratamento com deltametrina. Os inseticidas bifentrina, fenitrotiom e pirimifós metílico apresentaram baixa eficácia na redução de R. dominica, mas foram seletivos em favor do ácaro, mostrando maior número de fêmeas fisogástricas e r i para A. lacunatus. Com isso, conclui-se que deltametrina é o inseticida menos seletivo em favor de A. lacunatus. Entretanto, esse ácaro é capaz de parasitar ovos de R. dominica sob grãos tratados com todos os inseticidas avaliados. PALAVRAS-CHAVE: Praga de grãos armazenados, ácaro, piretróide, organofosforado, controle biológico ABSTRACT -The presence of natural enemies in stored grains and the need of pest control alternatives led to the assessment of the effect of insecticides on the mite species Acarophenax lacunatus (Cross & Krantz), an egg parasite of the stored grain pest Rhyzopertha dominica (Fabr.). The insecticides bifenthrin, deltamethrin, pirimiphos-methyl and fenitrothion were tested at 0.4, 0.5, 0.8 and 10 ppm, respectively. Insecticide treated wheat grains were spread in petri dishes and infested with 25 adults of R. dominica. Seven days later, three mites were added to each dish, in four replicates. The number of adults of R. dominica, grain weight loss and instantaneous rate of increase (r i ) of A. lacunatus were lower when the grain was treated with deltamethrin. Bifenthrin, fenitrothion, and pirimiphos-methyl were less effective in controlling the pest, but they were selective in favor of the mite, showed higher number of physogastric females and r i of A. lacunatus. Therefore, deltamethrin was less selective in favor of the mite species. Nonetheless the parasitic mite was able to parasitize eggs of R. dominica on wheat treated with all the insecticides evaluated.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Insecticide selectivity to the parasitic mite Acarophenax lacunatus (Cross & Krantz) (Prostigmata: Acarophenacidae) on Rhyzopertha dominica (Fabr.) (Coleoptera: Bostrichidae)

Gonçalves¹,

Faroni²,

Guedes³

et al. 2004

Neotrop. Entomol.

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“…Resistance was only observed in 18.75% samples from New South Wales (Herron, 1990). Collins et al (1993) oryzae strains collected in Australia were fenitrothion resistant . Fenitrothion resistance was also reported in an Indian S. oryzae strain that was highly resistance (39x) (Bansode, 1974) as well as one strongly resistant strain in Brazil.…”

Section: Resistance To Organophosphatesmentioning

confidence: 99%

“…impregnated filter paper, dusted grain or grain admixed with insecticide (Parkin, 1965, Champ, 1968, Collins et al, 1993. All techniques are based on observing mortality or knock-down of insects at discriminating dosage to screen the susceptibility or resistance.…”

Section: Management Of Insecticide Resistance In the Futurementioning

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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“…The only alternative chemical group, pyrethroids played an important role in managing the pest. Especially, bioresmethrin was used successfully for about 12 years in Australia but in 1990, resistance also was first detected (Collins et al, 1993). Since detection to pyrethroids including deltamethrin, the frequency of resistance increased more than 50%.…”

Section: Resistance To Insecticidesmentioning

confidence: 99%

Toxicity of Aromatic Plants and Their Constituents Against Coleopteran Stored Products Insect Pests

Kim¹,

Ahn²,

Kwon³

2012

New Perspectives in Plant Protection

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Resistance to Grain-Protectant Insecticides in Coleopterous Pests of Stored Cereals in Queensland, Australia

Cited by 82 publications

References 0 publications

Insecticide selectivity to the parasitic mite Acarophenax lacunatus (Cross & Krantz) (Prostigmata: Acarophenacidae) on Rhyzopertha dominica (Fabr.) (Coleoptera: Bostrichidae)

Insecticide selectivity to the parasitic mite Acarophenax lacunatus (Cross & Krantz) (Prostigmata: Acarophenacidae) on Rhyzopertha dominica (Fabr.) (Coleoptera: Bostrichidae)

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

Toxicity of Aromatic Plants and Their Constituents Against Coleopteran Stored Products Insect Pests

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