Benson, O., 2012. Efficacy of Chromolaena odorata leaf extracts on Biomphalaria pfeifferi eggs in control of Schistosomiasis. Zoology and Ecology, 22(3-4), pp.236-239.

Abstract

Schistosomiasis is still a problem in many parts of the world, with 85% infection in Africa. There is a need to control the snail, which is essential to complete the transmission circle. The molluscicidal activities of aqueous and ethanolic leaf extracts of Chromolaena odorata against eggs of Biomphalaria pfeifferi were investigated. Thirty viable eggs of this snail were exposed for 48?h to a serial dilution of 0 (control), 8, 20, 28, 40, 60, 80, and 100?ppm of distilled water and ethanolic extracts of C. odorata leaves. The LC50 and LC90 values of an aqueous extract were 65.75 and 139.54?ppm, respectively, while LC50 and LC90 of an ethanolic extract were 44.03 and 119.3?ppm, respectively. The two plant extracts showed a significant difference (p?<?0.05) in the mortality rates of B. pfeifferi eggs. The results deserve further studies in order to identify and characterize the molluscicidal components of C. odorata leaves