Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 6 Issue 3, 2004; Page No.(333-338 )

PRELIMINARY SCREENING OF SOME THAI INDIGENOUS PLANTS FOR MOLLUSCICIDAL ACTIVITY AGAINST POMACEA CANALICULATA (LAMARCK)

W. CHOBCHUENCHOM, S. MOUNGNOF AND D. INTHORN

Abstract

Pomacea canaliculata (Lamarck) is one of rice pest and causes a serious problem because of rice fields devastation. In this study, a total of 91 Thai indigenous plant samples from 78 different plant species were prepared as aqueous plant extract from 100 g fresh plant per one liter of distilled water and tested against canaliculata (Lamarck) with 3-5 mm in operculum diameter. And it was found that % mortality of snail at 72 h of incubation of 25 plants samples from 23 different species were higher than 90%. The LC50 of aqueous extracts prepared from these twenty-five Thai indigenous plants to P. canaliculata (Lamarck)- were determined. And it was found that Bougainvillea spectabilis (LC50 .= 39.11 mg/1), Calotropis gigantea (LC50 = 86.00 mg/1) and Croton tiglium (LC50 = 73.60 mg/1) showed strong molluscicidal activities.

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