در شرايط آب و هوايي استان اصفهان BOMBYX MORI L اثر تغذيه اي برگ دو واريته مختلف توت بر خصوصيات اقتصادي بيولوژيكو بيوشيميايي كرم ابريشم

The nutritional effects of two mulberry varieties on economical, biological and biochemical characters of SilkwormBombyx mori Lin Isfahan climate

In order to investigate the nutritional effects of mulberry varieties (Morus sp) on economical, biological and biochemical characters of silkworm Bomhyx mori, hybrid 103)(104 larvae were reared on two varieties of mulberry, i.e. Isfahan local variety and Kokoso. Data showed that larval performance i.e, larval weight, the percentage of daily increase ofʹ weight and larval duration were considerably improved by kokoso variety. Also cocoon parameters like cocoon weight, pupal weight and cocoon shell weight were increased in this group in comparison with larvae which 1ʹed on local mulberry leaves. The amounts of glucose and urea in heamolymph of 5ʹ1ʹ instar larva feeding on kokoso variety were much more than the other group. The increase of urea in larval heamolymph indicates that catabolic reactions of proteins and amino acids were activated and increased in this group. Also these amount of urea was reabsorbed by silk gland for silk protein syntesis and it causes increase in cocoon production of this group. But the amounts of triacyleglyceroles, cholesterol and minerals like calcium, phosphorus and ferrous in the larva which were fed by local mulberry leaves were more than others. This data indicates that metabolic activity in this group is lower and causes accumulation of these compounds in heamolymph.