Evaluation of ovicidal and developmental effects of Callistemon citrinus (Myrtaceae) methanolic leaf extract against human dengue vector Aedes aegypti (Diptera: Culicidae)
Author(s): Palanikumar M, Pravin Y, Navaneethan M, Mahendren S, Mohanraj RS and Dhanakkodi B
Abstract: Mosquitoes transmit serious human diseases, causing millions of death every year. Vector control is facing a threat due to the emergence of resistance to synthetic insecticides. Insecticides of plant origin may serve as suitable alternative to synthetic insecticides in the future. Therefore, the present investigation was undertaken to evaluate ovicidal and developmental effects of methanolic leaf extract of Callistemon citrinus against human dengue vector mosquito Aedes aegypti. Effect of methanolic leaf extract of C. citrinus on the hatchability of Ae. aegypti eggs were determined, hatching rate was calculated on the basis of non-hatchability of eggs. The hatchability of Ae. aegypti eggs was decreased when placed in media of methanolic leaf extract. The reduction in percent hatch was inversely proportional to the concentration of methanolic leaf extract used. Percent hatch of eggs placed in control medium was 88 % where as in 0.1, 0.10, 0.20 and 0.30% concentrations it was 72, 63, 45, and 20. 0.40% dose completely arrested hatching eggs. Extension in larval development time was in correlation to concentrations of methanolic leaf extract used. The study revealed that interference of bio – active compounds with the normal hormonal activity of the larvae. It can be concluded that plant leaf extract have a great potential to control Ae. aegypti and could be used as a part of vector management program.
Changes in development time (days) of Aedes aegypti
larvae reared in different
concentrations of the methanolic leaf extract of C. citrinus
How to cite this article:
Palanikumar M, Pravin Y, Navaneethan M, Mahendren S, Mohanraj RS, Dhanakkodi B. Evaluation of ovicidal and developmental effects of Callistemon citrinus (Myrtaceae) methanolic leaf extract against human dengue vector Aedes aegypti (Diptera: Culicidae). Int J Mosq Res 2017;4(4):05-11.