NUTRITIONAL EFFICIENCY AND ITS RELATION TO Bombyx mori L. PRODUCTIVITY UNDER DIFFERENT CONSTANT TEMPERATURES | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 5, Volume 7, Issue 1, January 2016, Page 21-26 PDF (420.21 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2016.50051 | ||||
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| Authors | ||||
| H. F. Dahi; Rehab H. Taha; Walaa G. Ibrahim | ||||
| Plant Protection Research Institute, Agricultural Research Center, Egypt | ||||
| Abstract | ||||
| All experimental studies on Bombyx mori L. under suitable temperatures aim to improve silk, cocoons and eggs productions. The fifth larval instar was reared under three different constant temperatures (20, 23 and 26 °C) to determine the growth, dietary efficiency, silk production and egg yield. Rearing performance as larval weight, duration and growth rate, effective rate of rearing, disease incidence, pupal weight, pupation ratio, pupal duration, adult longevity, fecundity and fertility were recorded. Cocoon parameters as cocoon, cocoon shell weights, cocoon shell ratio and nutritional parameters like ingesta, digesta, and approximate digestibility percentage were calculated and recorded. Silk filament length and filament breaks were recorded during cocoon reeling. Significant variations in the performance of B. mori were noticed due to the influence of temperature. Most of these studied parameters were significantly high for larvae reared at 20°C, as well as, the feed conversion efficiency parameters, ingesta and digesta were required to produce one gram of cocoon were higher in larvae reared at 20°C. Female moths were capable to mate with more than one male which could produce more egg laying and consequently fertile eggs. | ||||
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