title: Larvicidal activity of leguminous seeds and grains against Aedes aegypti and Culex pipiens pallens.
abstract: Larvicidal activity of methanol extracts of 26 leguminous seeds and 20 grains against early 4th-stage larvae of Aedes aegypti and Culex pipiens pallens was examined. At 200 ppm of the extracts from Cassia obtusifolia, Cassia tora, and Vicia tetrasperma, more than 90% mortality was obtained in larvae of Ae. aegypti and Cx. pipiens pallens. Extract of C. tora gave 86.7 and 100% mortality in the larvae of Ae. aegypti and Cx. pipiens pallens at 40 ppm but 59.2 and 78.3% mortality against larvae of Ae. aegypti and Cx. pipiens pallens at 20 ppm, respectively. At 40 ppm, extract of C. obtusifolia caused 51.4 and 68.5% mortality of the 4th-stage larvae of Ae. aegypti and Cx. pipiens pallens, respectively. Larvicidal activity of extract of C obtusifolia was significantly reduced when used at 20 ppm. Further studies of these plants as possible agents for mosquito control are warranted.
mesh_terms: D000330:Aedes; D000818:Animals; D003465:Culex; D002523:Edible Grain / Q000737:chemistry*; D007887:Fabaceae / Q000737:chemistry*; D007306:Insecticides; D007814:Larva; D010936:Plant Extracts; D012639:Seeds / Q000737:chemistry*
chemical_list: D007306:Insecticides; D010936:Plant Extracts