| Titles |
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English :
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Lethal effects of Spinosad And Azadirachtin on the cotton leaf
worm, Spodoptera littoralis( Boisd.) . ( Lepidoptera: Noctuidae)
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Arabic :
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تأثير الجرعة المميتة لكلآ من سبينوساد و أزاديراكتين على دودة ورق القطن
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| Abstract |
Laboratory experiments have been conducted to determine the lethal effects of Spinosad and Azadirachtin on the cotton leafworm Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) larvae by a diet incorporaction bioassay. Newly molted third instar larvae were exposed through ingestion to different concentrations. Larval mortality of S. littoralis increased with the concentration resulting a LC50 values of 1.38 g/ml and 0.14 g/ml for Spinosad and Azadirachtin respectively, the mortality times decreased with the concentration increasing. Sublethal effects were studied by treating of third instar larvae with a concetration equivalent to the respective LC50. Both insecticides significantly increased larval development period from treatment until pupation, but the effect of Azadirachtin was greater than Spinosad. The pupation period was significantly prolonged in male pupae when the larvae were treated with Spinosad, whereas with Azadirachtin this effect happened in both sexes. Egg viability was reduced with Azadirachtin, and the oviposition period was affected by Spinosad. No significant differences were found in preoviposition periods, spermatophore number, fecundity and adult longevity.
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| Publication year |
2008
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| Pages |
237-282
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| Organization Name |
Plant Protection Research Institute (PPRI)
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| City |
القاهرة
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| serial title |
حوليات العلوم الزراعية
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| Author(s) from ARC |
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| Agris Categories |
Pests of plants
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AGROVOC
TERMS |
Azadirachtin.
Fertility.
Longevity.
Reproduction.
Spodoptera littoralis.
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| Publication Type |
Journal
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