(DOWNLOAD) "Effect of Glucocorticiod on the Growth and Development of Silkworm Bombyx Mori (L)." by Bulletin of Pure & Applied Sciences-Zoology # eBook PDF Kindle ePub Free
eBook details
- Title: Effect of Glucocorticiod on the Growth and Development of Silkworm Bombyx Mori (L).
- Author : Bulletin of Pure & Applied Sciences-Zoology
- Release Date : January 01, 2006
- Genre: Engineering,Books,Professional & Technical,
- Pages : * pages
- Size : 176 KB
Description
1. INTRODUCTION Hormones can basically influence insect growth, development, metamorphosis, fecundity, and fertility. The exogenous application of ecdysone or their allied forms generally upsets the hormonal titre in the body and results in moulting disorder (Giesultwiz et al., 1980), disrupts normal growth and development (Singh and Russel, 1980) and causes inhibitory effects on reproduction (Thompson et al., 1971; Jalaja et al., 1976; Khan et al., 1990). The invertebrate hormone with particular reference to juvenile hormone and its analogs have been shown to exert profound influence on the growth and development of silkworms. The information pertaining to the effect of vertebrate hormones on invertebrates in general and silkworm in particular is very scanty. A few investigators have made an attempt to investigate into the useful effects of various vertebrate hormones on the silkworm commercial characteristics (Thyagaraja et al., 1985; Bharathi et al., 1987; Karthikeyan et al., 1991). Recent years, the presence and activity of various vertebrate steroid hormones have been demonstrated in life system of many insects (Bhaskar et al., 1983; Bharathi et al., 1984; Shashindran Nair et al., 2002; Miranda et al., 2002). Since the initial study of Mordue, (1967) reported the effect of mammalian corticosteroids on insect growth, development and enhanced production has been extensively studied later by several other investigators (Smith et al., 1968; Rosinski et al., 1978; Gawienoski et al., 1987).