Studies on the insecticidal properties of Chromolaena odorata (Asteraceae) against the life cycle of the mosquito, Aedes aegypti (Diptera: culicidae
Abstract
Leaf extract of the species, Chromolaena odorata was evaluated for the egg hatchability, larvicidal and pupicidal activity of mosquito, Aedes aegypti under the room temperature in the laboratory. Dosage value as expressed in ppm was 10 to 140 for Aedes aegypti. A relationship was observed between the plant extract doses and percentage mortality. The percentage of egg hatchability, larval and pupal mortality were found to be increased with increase in the dosage. Based on the probit analysis, the LC50 value of egg (99.15), I instar (42.24), IV instar (101.49) and pupae (121.57) were hence assumed
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