Abstract
The seed oils (petroleum ether extract) of three plants, Azadirachta indica, Annona squamosa and Pongamia pinna ta were tested against the cyclops, Mesocyclops leuckarti sensu lato. Out of the seed oils tested, oil of Pongamia pinnata produced excellent cyclopicidal action followed by Annona squamosa. There was, however, no activity with Azadirachta indica oil. Further examination of chromatographic fractions of P. pinnata oil narrowed down activity to one of four fractions. Les essences de graines de trois plantes Azadirachta indica, Annona squamosa, et Pongamia pinnata ont ete experimentees contre les cyclopes, Mesocyclops leuckarti sensu lato. Parmis les essences testees, l’essence du Pongamia pinnata produisit un excellent effet cyclopidal, suivit de celle de l’Annona squamosa. Par contre il n’a eu aucune activite avec l’essence de l’Azadirachta indica. Un examen supplementaire des fractions chromatographiques de l’essence de P. pinnata reduisit l’activite a l’une des quatre fractions.
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