| Titles |
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English :
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Non-target effects of spinosad (Actinomycete) alone & combined with abamectin (Streptomyces) on life stages of two-spotted spider mites under laboratory conditions
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| Abstract |
Spinosad is a fermentation product from the soil actinomycete Saccharopolyspora spinosa and a reduced-risk inseclicide. It exhibits a high degree of selective toxicity towards the insect orders Lepidoptera, Diptera and Thysanoptera, but less toxic to many beneficial arthropods. The present study tested the possible alterative usage of Spinosad as acaricide in comparison with the commercial one Abamectin (Streptomyces) in controlling the two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae). The Direct and indirect toxicily tests (Spraying and Leaf-disk dipping techniques, respectively) including adulticide and ovicide bioassays were performed on a laboratory susceplible strain. The mites were reared on sweet potato leaves. Potato leaf disks were treated with five rates of Spinosad (20, 25, 30, 35 and 40 ppm), five rates of Abamectin (0.125, 0.25, 0.5, 1 and 2.5 ppm), five rates of combination of Spinosad and Abamectin or water as control. Apparently, toxic effects of Spinosad on the mortality, fecundity, hatchability of the two-spotted spider mite were observed specially by using the indirect toxicity test. Combination of Spinosad with Abamectin showed contradictory and promising responses compared to Spinosad alone. Combined treatment of adult mites resulted in death of all hatched larvae while no death recorded for larvae after treatment with Spinosad. Using the direct toxicity test, combined treatment resulted in high percentage of dead adults compared to the indirect toxicity test using Spionsad. These results indicate that Spinosad has significant acaricidal effects against T. urticae and may be used as complementary strategy to Abamectin in biological control of this pest.
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| Publication year |
2006
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| Pages |
45
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| Availability location |
معهد بحوث وقاية النباتات- ش نادى الصيد - الجيزة
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| Availability number |
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| Organization Name |
Plant Protection Research Institute (PPRI)
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| serial title |
The 2nd Internalional Conference on Natnral Toxins
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| Author(s) from ARC |
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| External authors (outside ARC) |
مها فريد سليمان
كلية العلوم-جامعه قناه السويس
مصطفي حسين النجار
كلية العلوم-جامعه قناة السويس
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| Agris Categories |
Pests of plants
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AGROVOC
TERMS |
Actinomycetales.
Laboratory experimentation.
Lepidoptera.
Side effects.
Streptomyces.
Tetranychidae.
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| Publication Type |
Conference/Workshop
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