Chuenjit Meeposom. The utilization of cashew nut shell crude extract for golden apple snail (Pomacea canaliculata) control. Master's Degree(Appropriate Technology for Resources and Environmental Development). Mahidol University. : Mahidol University, 2004.
The utilization of cashew nut shell crude extract for golden apple snail (Pomacea canaliculata) control
Abstract:
Toxicity tests on the effect of cashew nut shell crude extract against small
and medium sized (3-15 and 16-30 mm) golden apple snail (Pomacea canaliculata)
were conducted under laboratory conditions. Extracts were prepared in 40% local
liquor and 95% ethanol at 48 hours maceration.
The observed mortality data of this study was analyzed for median lethal
concentration (LC50) at 95% confidence interval. The local liquor cashew nut shell
crude extract LC50 value (96 hours) was 79.78 and 81.67 ppm for small and medium
sized snails, respectively. The ethanolic cashew nut shell crude extract LC50 value for
small and medium sized snail was 11.39 and 22.81 ppm, respectively.
Based on the results, both local liquor and ethanolic cashew nut shell crude
extracts have potent molluscicidal activity. However, the ethanolic cashew nut shell
crude extract is more toxic to both small and medium sized golden apple snail than the
local liquor cashew nut shell crude extract. Moreover, compared to the reference
molluscicide, Niclosamide, both local liquor and ethanolic cashew nut shell crude
extracts indicated considerably less toxicity.