Effectiveness of spinosad as a grain protectant against resistant beetle and psocid pests of stored grain in Australia

Nayak, Manoj K.; Daglish, Gregory J.; Byrne, Valerie

doi:10.1016/j.jspr.2004.07.002

Cited by 134 publications

(100 citation statements)

References 20 publications

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“…Some earlier studies (Subramanyam et al, 1999;Fang et al, 2002;Nayak et al, 2005) have shown that T. castaneum is the least susceptible stored-product pest to spinosad and that the recommended dose of 1 mg/kg cannot control adults of this species. After a 14-day exposure period, Subramanyam et al (1999) recorded a mortality of 52% among T. castaneum adults on wheat treated with spinosad at the dose of 6 mg/kg, and Fang et al (2002) reported that a full control of T. castaneum adults required spinosad doses exceeding 4 mg/kg, while Huang and Subramanyam (2007) found a 98% efficacy of spinosad at 2 mg/ kg after 12 days of contact of T. castaneum adults.…”

Section: Discussionmentioning

confidence: 99%

“…For example, Nayak et al (2005) reported a 2.4-fold lower efficacy of spinosad (1 mg/kg) against a population of S. oryzae resistant to malathion than against laboratory population. In our own research, spinosad applied at the doses of 2.5 and 5 mg/kg was 2.0-and 1.6-fold less effective against the Nikinci population of T. castaneum after 14 days than it was against the laboratory population, while no significant difference was detected between the laboratory and Jakovo populations.…”

Section: Discussionmentioning

confidence: 99%

“…Resistance to contact insecticides, as well as the geographic origin of populations of storage insects, have significant effects on their susceptibility to spinosad and abamectin (Fangeng et al, 2004;Nayak et al, 2005;Hussain et al, 2005;Athanassiou et al, 2008a).…”

Section: Introductionmentioning

confidence: 99%

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Efficacy of spinosad and abamectin against different populations of red flour beetle (Tribolium castaneum Herbst) in treated wheat grain

2013

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SUMMARYThe efficacy of spinosad and abamectin against T. castaneum adults from a laboratory population with normal susceptibility to contact insecticides and against malathion-resistant populations from Nikinci and Jakovo was tested in the laboratory (25±1ºC and 60±5% r.h.). The insecticides were applied to 500 g of untreated wheat grain for each of the following application doses: 0.25, 0.5, 1.0, 2.5 and 5.0 mg a.i./kg. After treatment, wheat was divided into three equal subsamples and 50 T. castaneum adults from each of the three test populations were released the next day into jars for each dose. Mortality was evaluated after 7, 14 and 21 days of exposure to treated wheat grain.Generally, higher concentrations and longer exposure periods resulted in higher efficacy of both insecticides, but abamectin was significantly more effective than spinosad against all three tested populations. After 7 days of exposure, mortality did not exceed 30% in any test variant. Fourteen days after treatment with the highest dose (5 mg/kg) of spinosad, mortality was highest (75%) in the laboratory population, while treatment with the same dose of abamectin achieved the highest mortality (58%) in the laboratory and Jakovo populations. After 21 days, spinosad applied at the rate of 5 mg/kg was most effective (97% mortality) in the laboratory population, while 88% efficacy was recorded in Jakovo population and 87% in Nikinci population. Abamectin doses of 2.5 and 5 mg/kg caused high adult mortality of 94-100% in the laboratory and Jakovo populations, and a significantly lower mortality in Nikinci population (75 and 86%, respectively). Statistically significant differences in the efficacy of spinosad, and particularly of abamectin, were detected among the three tested populations, the greatest difference being between the laboratory and Nikinci populations, which clearly indicates that resistance of T. castaneum adults to malathion had a significant influence.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Efficacy of spinosad and abamectin against different populations of red flour beetle (Tribolium castaneum Herbst) in treated wheat grain

2013

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“…The data given in the Nayak et al (2005) found that an application of 1ppm of spinosad cause 50% mortality of adults on produced wheat. Larval weight loss of T. granarium under the different treatments of pyriproxifen gave the best result.…”

Section: Larval Weight Reductionmentioning

confidence: 99%

Comparative Efficacy of Three Synthetic Igrs (Bruce, Runner and Falcon) on the Development of Trogoderma Granarium (Everts) (Coleoptera: Dermestidae)

Ahmad¹,

Zaidi²

2014

JGIASS

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In the present research three IGR's viz bruce , Falcon and Runner with different concentrations 0.03, 0.06 and 0.09 were tested against Trogoderma granarium under laboratory conditions.. Different dilutions of IGRs were prepared using distilled water and were applied on grains which were air dried before insect release. Twenty grubs (7 days old) were allowed to feed treated grains and data were recorded for larval mortality, larval weight, pupal and adult emergence. On overall basis at larval stage pyriproxifen gave best results, causing mean mortality 7.08% followed by Methoxyfenazide (Runner) with mean value 5.83% while Tebufenazide (Falcon) caused minimum mortality 3.33% at maximum concentration 0.09 ppm. Mortality and concentration showsed positive correlation while mortality and interval showed negative correlation. All the three IGR's showed good impact on the reduction of larval weight. Pyriproxifen (Bruce) caused 32.49% t larval weight reduction over control with mean value 4.27 (unit ?) followed by methoxyfenazide (Runner) which gave 29.82% larval weight reduction followed by control mean value 4.73. Tebufenazide (Falcon) gave minimum 26.40% larval weight reduction over control with mean value 2.61 (unit ?). Similarly, regarding pupal development, , pyriproxifen gave highest percent pupal reduction over control 75.26% with mean value 5.34 while Tebufenazide gave minimum pupal percent reduction over control 63.22% with mean value 6.64.

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“…In Australia, detection of high-level resistance to phosphine in psocids infesting stored commodities has elevated their pest status enormously and put them alongside the major beetle pests (Nayak et al, 2003). Moreover, the importance of psocids in Australia has been enhanced in recent years, mostly due to the failure of almost all currently registered grain protectants against these pests (Nayak et al, 2005; Daglish, 2006, 2007).Glutathione S-transferases (GSTs, EC 2.5.1.18) belong to a supergene family of enzymes that are involved in detoxification of xenobiotics, protection from oxidative damage, and intracellular transport of hormones, endogenous metabolites, and exogenous chemicals (Hemingway et al, 1991;Huang et al, 1998;Freitas et al, 2007). In insect, GSTs are of primary interest because of their role in phase II detoxification of several chemical insecticide classes and their potential contributions to insecticide resistance in economically important pest species in diverse agronomic cropping systems, as well as insecticide resistance in disease vectors (Fournier et al, 1992;Yu, 2002).…”

mentioning

confidence: 99%

Purification and partial characterization of glutathione S‐transferase from insecticide‐resistant field populations of Liposcelis paeta Pearman (Psocoptera: Liposcelididae)

Dou

et al. 2009

Arch Insect Biochem Physiol

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Enzymes that possess glutathione S-transferase (GST) activity were purified to homogeneity by glutathione-agarose affinity chromatography from three field populations of Liposcelis paeta (Pearman). These populations were collected from Nanyang city of Henan Province (NY), Wuzhou (WZ) and Hezhou (HZ) cities of Guangxi Province, China, and had different susceptibilities to dichlorvos [LC(50)s of the NY (281.48 mg/m(2)), the WZ (285.07 mg/m(2)), and the HZ (243.52 mg/m(2)), respectively]. The specific activities of purified enzymes from these three populations increased 32.24-, 99.81-, and 42.52-fold, respectively. Kinetic analyses showed that the catalytic activity of purified GST from NY population towards GSH was much higher than the others, while WZ population reached the highest in V(max) (CDNB). SDS-polyacrylamide electrophoresis revealed that the purified GST had two subunits with a molecular mass of 23.31 and 20.43 kDa for NY, 53.14 and 20.13 kDa for WZ, and 50.79 and 19.42 kDa for HZ, respectively. The in vitro inhibition studies of GSTs indicated that three kinds of insecticides (chlorpyrifos, carbosulfan, and cypermethrin) and five metallic ions (Zn(2+), Ba(2+), Ca(2+), Hg(2+), Mn(2+), and Mg(2+)) all possessed inhibitory effects on purified GST, and ethacrynic acid (EA, a specific inhibitor of GST) expressed inhibitory effects. In the bioassay, three populations of L. paeta had different susceptibilities to different insecticides, even after they were reared on diets consisting of 25% EA. The GST activities of L. paeta from different areas also showed different temperature and pH stabilities. The differences in GST among the three populations may be attributed partially to the differences in control practices for psocids between Henan and Guangxi Provinces. (c) 2009 Wiley Periodicals, Inc.

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Effectiveness of spinosad as a grain protectant against resistant beetle and psocid pests of stored grain in Australia

Cited by 134 publications

References 20 publications

Efficacy of spinosad and abamectin against different populations of red flour beetle (Tribolium castaneum Herbst) in treated wheat grain

Efficacy of spinosad and abamectin against different populations of red flour beetle (Tribolium castaneum Herbst) in treated wheat grain

Comparative Efficacy of Three Synthetic Igrs (Bruce, Runner and Falcon) on the Development of Trogoderma Granarium (Everts) (Coleoptera: Dermestidae)

Purification and partial characterization of glutathione S‐transferase from insecticide‐resistant field populations of Liposcelis paeta Pearman (Psocoptera: Liposcelididae)

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