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Browsing by Author Saad, Mahmoud S. I.

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  • Biological and physiological effects of pyriproxyfen insecticide and amino acid glycine on silkworm, Bombyx mori L

    • Authors: Saad, Mahmoud S. I.;  Advisor: -;  Participants: Helaly, Walaa M. M.; El-Sheikh, El-Sayed A. (2019)

  • The present investigation was carried during the spring (season 2018) to evaluate the effect of growth regulator pyriproxyfen at concentrations 1, 10, and 100 μg/larva on Bombyx mori L., as well as the effect of amino acid glycine 1% concentration solely or in combination with pyriproxyfen at the fifth day of fifth larval instar. Feeding fifth instar larvae of B. mori on mulberry leaves dipped in glycine 1% resulted in a significant increase in the weight of mature larvae and shorter larval duration, recording 5.12 g and 9.00 days, respectively. Meanwhile, the highest significant pupal weight (1.277 g) was attained when larvae were treated topically with pyriproxyfen at 10 μg/larva in...
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  • Controlling of bacterial and fungal diseases that contaminating mulberry silkworm, Bombyx mori by using some plant extracts

    • Authors: Saad, Mahmoud S. I.;  Advisor: -;  Participants: Elyamani, Enas M. Y.; Helaly, Walaa M. M. (2019)

  • All tested concentrations of black seed extract increased the silk ratios of the resulted cocoons as compared to the infected control. For technological parameters, all tested extracts at 3% concentration caused the highest silk filament length; meanwhile control larvae recorded the highest silk filament weight and size. Regarding the mulberry silkworm, B. mori artificially infested with conidial solution of Beauveria bassiana when treated with all concentrations of the tested plants showed an enhancement in larval weight, pupal weight, cocoon weight, cocoon shell weight, silk filament length, and filament weight and reduced the larval mortality percentage. The highest silk filament s...