Effects of Juvenile and Ecdysone Hormones Treatments in Silkworm (Bombycidae: Bombyx mori)

Turgay Izzetoglu G. , Oezkorkmaz F., Zeka O., Oeber A.

KAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI, cilt.15, ss.525-530, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 15 Konu: 4
  • Basım Tarihi: 2009
  • Sayfa Sayıları: ss.525-530


Silkworm. Bombyx mori, goes through complete metamorphosis under control of endocrine system by hormones which guide various life stages of silkworm Corpara allata (CA) and prothorasic gland concerning the endocrine systems secrete juvenile and ecdysone hormones, respectively In this study. effects of the two hormones at different amounts (1st dose: 0.45 ml. 2nd dose: 0.90 ml) and stages (0 and last days of 4th instar; 0, 3rd and last days of 5th instar) were investigated. Hemolymphs of larvae fed orderly with mulberry leaf in suitable culture room were removed. The treatment consisted of the control. juvenile and ecdysone hormones groups. The hemolymph was applied as two different doses to groups of juvenile and ecdysone hormones. Weight-length of larvae, weight-length-diameter of cocoon and weight of pupae were measured until adult stages. In order to determine differences among groups, the data were evaluated with one way analysis of variance (ANOVA) (P < 0.05). The results show that treatments of different amounts of juvenile and ecdysone hormones to instars caused significant differences in cocoons (weight-length-diameter). which may explain that these hormones affect the structure of silk gland at the cocoon and the weights at pupae