الفهرس 
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Abstract
The present work was conducted to evaluate the effect of four botanical oils extracted from the four plants namely; Lepidium sativum, Cyperus esculentus, Rosmarinus officinalis and Cyperus rotundus as nutritional additives to enrich mulberry leaves offered to Bombyx mori L. larvae.
Enriching mulberry leaves offered to grown silkworm larvae with 0.1, 0.05 and 0.025 % of Lepidium sativum, Cyperus esculent and 0.05 and 0.025 % Cyperus rotundus and Rosmarinus officinalis showed the lowest mortality rates and decreased the larval duration periods compared with the control, also Lepidium sativum oil at all tested concentrations exhibited the highest cocooning percentage. It was found that, 0.1 % Lepidium sativum, Rosmarinus officinalis and Cyperus esculentus oils increased the fresh cocoon weight, cocoon shell weight, silk filament length and silk filament weight. Rosmarinus officinalis at 0.1 % increased the silk content ratio. Cyperus esculentus oil at 0.1 % and Lepidium sativum oil at 0.025 % increased silk filament size. Also, the effect of addition of three compounds namely; flume forte, potassium sulfonate and dettol as disinfectants on silkworm, Bombyx mori was evaluated. It was found that, the treatement of mulberry leaves with the disinfectants, especially flume forte and potassium sulfonate compounds inhibit the symptoms of bacterial disease and caused increase of larval, pupal and silk gland weights, cocooning percentage, pupation percentage, fertility percentage and fecundity of female. Treatment with the tested botanical oils and disinfectants enhanced the growth of the mulberry silkworm and subsequently improved the productivity characters of the resulted cocoon (weight, silk ratio). Therefore, a noticeable improvement was detected in the technological parameters of the reeled silk filament (length, weight, size).