EFFECTS OF PHYTOESTROGEN FROM WHITE KWAO-KRUA (Peuraria mirifica) ON THE DEVELOPMENTAL STAGES OF THAI MULTIVOTINE SILKWORM (Bombyx mori)

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Published: Nov 1, 2007
Keywords:
phytoestrogen Peuraria mirifica developmental stages Bombyx mori

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Kanitsara Chawna*
Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, Thailand
Suraphon Visetson
Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, Thailand
John Milne
Department of Biology, Faculty of Science, Mahidol University, Bangkok, Thailand
San Wilai
Department of Biology, Faculty of Science, Mahasarakham University, Mahasarakham, Thailand
Chaiwud Sudthongkong
Samutsakhon Coastal Fisheries Research and Development Center, Samutsakhon, Thailand

Abstract

This experiment was carried out to evaluate the effects of ethanolic extracts of phytoestrogen - rich plant, white Kwao-Krua (Peuraria mirifica) on toxicity, larval maturation and cocoon character of Thai Multivotine Silkworm, Bombyx mori. The toxicity (LC50) at 96 hours was 9.51 % w/v (r2= 0.94) after applying the extracts on mulberry leaves before feeding the 48 - hour old fifth in star silkworm. In addition, the crude extracts were administered topically on mulberry at 3 concentrations, 1%, 5%, and 10% w/v on the 48 -hour old fifth instar silkworm. The results showed decreased weight of larvae, pupae and at 5% and 10% w/v.  However, the larval, cocoon and shell cocoon weights at 1% w/v treatment increased.  Furthermore, the larval period was shortened up to 24 hours of all larval trialed.  The results suggest that the extracts containing phytoestrogen may affect on growth and molting of silkworm. The physiology and biochemical mechanisms of phytoestrogen from this plant are discussed.  


Keywords: phytoestrogen, Peuraria mirifica, developmental stages, Bombyx mori


Corresponding author: E-mail: Khemphet2006@hotmail.com

Article Details

Issue
Vol. 7 No. 1-1 (2007)
Section
Original Research Articles

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Author Biography

Kanitsara Chawna*, Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, Thailand

Department of Zoology, Faculty of Science, Kasetsart University,  Bangkok 10900, Thailand

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