Philippine E-Journals

Molluscicidal Activity of Callicarpa eriocloma Schauer (Kagong) and Uvaria rufa Blume (Hilagak) Against Pomacea canaliculate

Victoria G. Venus

 

Abstract:

This study determined the toxicity of the leaf extracts of Callicarpa eriocloma Schauer (Kagong) and Uvaria rufa Blume (Hilagak) on golden snails (Pomacea canaliculata). The phytochemical analysis showed that the extracts contained alkaloids and cyanogenic glycosides which are highly toxic and detrimental to certain individuals. It was evident that T3 (control) had the highest mean of 3.24, followed by T1 Ce with a mean of 2.0 and T3 Ur with the lowest mean of 1.67. The data were transformed using the square root method. Significant differences existed among the three treatments which imply that the treatments have different killing effects. The Duncan Multiple Range Test determined the significant differences among the treatments. The leaves of the Callicarpa eriocloma Schauer (Kagong) and Uvaria ruffa Blume (Hilagak) are potential molluscicides due to the presence of alkaloids and cyanogenic glycosides. There were significant differences among the treatments after two and three hours of application which means that the longer time of exposure to treatments of the same concentrations, the greater mortality of the golden snails. The result provides a useful foundation for further in-depth studies to ensure its wider applicability in different bodies of water and to evaluate its toxicity on other species.