International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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The Effects of Vitamin C on Biological, Biochemical and Economical Characteristics of the Silkworm, Bombyx mori L.

  • Etebari, Kayvan (Dept. of Sericulture, College of Natural Resources, University of Guilan) ;
  • Ebadi, Rahim (Dept. of Plant Protection, College of Agriculture, Isfahan Univ. of Technology) ;
  • Matindoost, Leila (Dept. of Entomology, College of Agriculture, University of Guilan)
  • Published : 2004.03.01
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Abstract

In order to investigate the effects of supplementary nutrients on silkworms, Bombyx mori, an experiment was conducted with ascorbic acid treatments. Dietary supplements of ascorbic acid 1, 2 and 3% were fed to silkworm larvae through 1st to 5th instar, The larvae were fed by mulberry loaves of Kokoso variety and the supplementary loaves were used once a day. These treatments resulted in a significant increase of biological parameters such as larval weight, the rate of food consumption and the approximate digestibility of the food. But the economical parameters such as cocoon weight and cocoon shell weight didnt show considerable difference compared to control. Dietary supplement of 2% ascorbic acid increased the larval weight by 7.8% and reached to 1.065g, which had the highest weight increase in the fourth day of 4th instar larvae. The percentage of daily weight increase in this group of larvae (79.01%) had significant difference compared with other treatments. The nutritional efficiency index in this group of larvae was better than others. Also the abundance of biochemical macromolecules such as glucose, cholesterol, triacylglycerol and urea in haemolymph of larvae fed by 2% ascorbic acid increased to become 29.75 (mg/㎗), 24 (mg/㎗), 75.4(mg/㎗) and 32.1(mg/㎗) respectively. But protein contents of haemolymph of larvae in each treatment were not significantly different. Since all the results achieved were not considerable either statistically or economically, this method could not be recommended to improve the sericultural parameters.

Keywords

References

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