Spinning stimulation of silkworm, bombyx mori l. by pimpinella anisum [electronic resource]

Includes bibliographic reference

The present work has been carried out at Plant Protec. Dept. Fac. of Agric., El Fayoum Univ. dur.mg spring season of 2014 to study the effect of Pimpinella anisum as food additives on spinning of silkworm, Bombyx mori L. Dried seeds of P. anisum were crushed and dissolved in distilled water to prepare different concentrations (5, 10, 15,20 and 25 mg/ml.). In the present study, results showed that, the concentration 10 mg/ml. of P. anisum occupied the first category to improve the most studied parameters of B. mori L when comparing to control. Where 5th instar mortality percentage recorded 5% compared to 10% in control. 5th instar larval duration were 10.40 days compared to 10.44 days in control. Cocooning percentage were 96.82% compared to 92.22% in control and cocoon indices were 1.192 g, 0.253 g and 21.23% for cocoon, cocoon shell weights and cocoon shell ratio comparing to 1.088 g, 0.194 g and 17.90% for the• control respectively. Total haemolymph protein registered 75.90 mg/ml compared to 67.52 mg/ml in control. Protease enzyme were 64.33 µg alanine/min/ml compared to 57.21 µg alanine/minlml. in control and silk productivity were 2.434 cg/day compared to 1.866 cg/day in control.

Summary in Arabic