| Summary: | The study was conducted to evaluate the molluscicidal activity of E. rheedii methanol bark extract against P. canaliculata and to screen for phytochemical compounds of E. rheedii bark extracts. The golden apple snails with size range of 20 – 40 mm were treated with four different concentrations of E. rheedii (1000, 5000, 10000 and 20000 ppm) and paddy-field water mix with 50% methanol serving as the control treatment. The molluscicidal effects of the extract were evaluated after 24, 48 and 72 hours. The results of the study showed that high treatment concentrations (10000 and 20000 ppm) recorded the highest mortality rate (100%) while low concentrations (1000 ppm) showed the lowest mortality rate (27%). However, no mortality was recorded in the control treatment. The molluscicides activity with LC50 is 1,611 ppm and LC90 is 4,266 ppm and could be attributed to the presence of saponin in the bark extracts. E. rheedii bark extract provides a great potential for developing green pesticides to control P. canaliculata. Nevertheless, further research is needed to determine its biochemical mechanism. © 2017, Malaysian Society of Analytical Sciences. All rights reserved.
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