Effect of certain vertebrate hormones and plant extracts on biological and economical characters of mulberry silkworm, bombyx mori L. / Tahia Azooz Fouad ; Supervised Ibtisam Abdlmoneim Hemeida , Hanan Mohamed Abdelsamad Hamada , Usama Mohamad Mohamad Ghazy

Thesis (Ph.D.) - Cairo University - Faculty of Agriculture - Department of Economic Entomology and Pesticides

The present work aimed to study the effect of some vertebrate hormones and plant extracts on the egg parameters and encourage silkworm moths to increase the number of laid eggs, as well as economic characters of the silkworm, Bombyx mori L.The obtained data revealed that, treatments with vertebrate hormones enhanced traits for the number of unfertilized eggs, number of fertilized eggs, number of unlaid eggs, fecundity, fertility, coefficient of unlaid eggs and hatchability. In addition, vertebrate hormones increased the coefficient of laid eggs parameter. The increment range from 13,905 up to 34.550% for spraying application and ranged from 17.149 up to 34.605% for dipping application. Also, using vertebrate hormones improved the economic characters of fresh cocoon weights, cocoon shell weight and cocoon shell ratio.Using plant extracts Ginseng and Achillea improved the number of unfertilized eggs, number of fertilized eggs, number of unlaid eggs, fecundity, fertility, coefficient of unlaid eggs and hatchability.Coefficient of laid eggs parameter was improved. The increment rate for spraying applications ranged from 16.787 to 35.011% for Ginseng and Achillea treatments. For dipping application it ranged from 18.659 to 34.773% % for Ginseng and Achillea extracts. Also, using plant extracts Ginseng and Achillea enhancing traits of fresh cocoon and cocoon shell weight, cocoon shell ratio, the silk reelable filament length, weight and silk size

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