Accumulation of mineral dusts from wheat by Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

Patourel, G.N.J. le; Shawir, Mohamed S.; Moustafa, F.

doi:10.1016/0022-474x(89)90012-x

Cited by 23 publications

(9 citation statements)

References 7 publications

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“…The rate of silica dust pick-up by S. oryzae continues to occur despite loss from the cuticle, and dust tightly adhering to the insects, especially those in surface punctures, does not dislodge easily. Therefore, an equilibrium in the rate of pick-up from grain by the insect and the rate of loss from the cuticle can never be reached (Ie Patourel et al 1989). Vrba et al (1983) found that with T. confusum adults exposed to a silica aerogel, Aerosil 380, cleaning the adults by passing them through diet did not result in reduced mortality.…”

Section: Differences In Insect Morphology and Physiologymentioning

confidence: 97%

“…Insects removed from the treated grain and allowed to walk on clean surfaces lose some of the particle aggregates. Using radiolabeled silica aerogel (Sipernat 22 S), Ie Patourel et al (1989) have shown that the rate of pick up of silica by S. oryzae adults was linear at 0.01-1 gram per kilogram of wheat.…”

Section: Differences In Insect Morphology and Physiologymentioning

confidence: 99%

“…Generally, insects moving through treated grain pick up a thin coating of an inert dust (Singh 1981, Ie Patourel et al 1989. Once particles are picked-up by an insect or mite, they aggregate on surfaces of the body, notably in punctures and joints.…”

Section: Differences In Insect Morphology and Physiologymentioning

confidence: 99%

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Inert Dusts

Subramanyam¹,

Roesli²

2000

Alternatives to Pesticides in Stored-Product IPM

169

143

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Section: Differences In Insect Morphology and Physiologymentioning

confidence: 97%

Section: Differences In Insect Morphology and Physiologymentioning

confidence: 99%

See 1 more Smart Citation

Inert Dusts

Subramanyam¹,

Roesli²

2000

Alternatives to Pesticides in Stored-Product IPM

169

143

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“…Admixing of powder with maize and wheat was done manually, where uneven distribution of powder particles over the maize and wheat kernel surfaces was more likely to occur. Accumulation of powder over the insect's body is directly proportional to the concentration of the powder [28], and insect's behavior such as mobility [29]. The toxicity of such powders will depend on particle accumulation from the maize and wheat on to the insect's body and adsorption of lipid from the insect's cuticle by the powder particles [28,30].…”

Section: Discussionmentioning

confidence: 99%

“…Accumulation of powder over the insect's body is directly proportional to the concentration of the powder [28], and insect's behavior such as mobility [29]. The toxicity of such powders will depend on particle accumulation from the maize and wheat on to the insect's body and adsorption of lipid from the insect's cuticle by the powder particles [28,30]. Therefore, uneven distribution of filter cake and Triplex on maize and wheat might have contributed to unexplained variations in mortality and progeny production responses of the tested species.…”

Section: Discussionmentioning

confidence: 99%

Efficacy of Filter Cake and Triplex Powders Against Three Internally Developing Stored-product Insect Species

Tadesse¹

2019

AJE

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Filter cake and Triplex powders from Ethiopia were applied to maize and wheat in the laboratory to determine efficacy against the lesser grain borer, Rhyzopertha dominica (Fabricius) (Coleoptera: Bostrichidae); maize weevil, Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae); and rice weevil, Sitophilus oryzae (Linnaeus) (Coleoptera: Curculionidae). These species are major insect pests associated with stored grain in Ethiopia. Efficacy of the two powders was determined by exposing 20 adults of each species to 100 g of maize and wheat treated with 0, 0.3, 0.5, 0.7, 1, 2, 3, 4 and 5 g/kg of filter cake, and 0, 0.5, 0.7, 1, 2, 3, 6, 8 and 10 g/kg of Triplex. Adult mortality was determined 14 d after exposure to untreated and treated grain. Adult progeny production at each species-powder-concentration combination was determined at 42 d. Complete mortality (100%) of R. dominica was achieved on maize treated with 3-5 g/kg of filter cake; however, on maize 100% mortality of S. zeamais, and S. oryzae was not achieved at any of filter cake concentrations. Complete mortality of R. dominica adults was observed on wheat treated with 2-3 g/kg of the filter cake. Complete mortality of S. zeamais and S. oryzae was achieved when adults were exposed to wheat treated with 0.7-3 g/kg of filter cake. Mortality was less than 100% at all Triplex concentrations on maize and wheat for all three species. Adult progeny production of R. dominica was wholly suppressed at filter cake concentrations of 1-5 g/kg on maize, whereas progeny production of S. zeamais and S. oryzae on maize was not entirely suppressed at any of the filter cake concentrations. No progeny of R. dominica was observed on wheat treated with 2-3 g/kg of filter cake. Similarly, progeny production of S. zeamais and S. oryzae was completely suppressed on wheat treated with 3 g/kg of a filter cake. Complete suppression of progeny production of the three species was not achieved at any concentration of Triplex on both maize and wheat. These powders have potential in managing R. dominica, S. zeamais, and S. oryzae infesting maize and wheat.

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