Molluscicidal Activity of Kulkul-lasi (Commelina benghalensis) Leaves Extract on Golden Apple Snail (Pomacea canaliculata)

Abstract

One of the serious problems of organic rice producers in the Philippines is the infestation of the GoldenApple Snail (Pomacea canaliculata) invading almost all rice fields. Therefore, investigation oftheir control is now of considerable interest. This study evaluated the molluscicidal activity of Commelina benghalensis (also known as kulkul-lasi) against the juvenile and adult P. caniculata. The active components of C. benghalensis were obtained through ethanolic extraction and concentrated in a rotary evaporator. Juvenile andadult P. caniculata were exposed to the different concentrations of the extracts. The percentage mortality was recorded after 24 hours of exposure, and the unusual behaviours were also noted. Results revealed that 100% mortality of both juvenile and adult was recorded in all extract concentrations. Unusual behaviour such as lack of movement, lack of response, secretion of mucus, and bubbling was observed. Therefore, C. benghalensis extract has molluscicidal activity against the juvenile and adult P. caniculata, which indicates the great potential of this plant in developing effective natural molluscicide.