Larvicidal Activity ofCassia occidentalis(Linn.) against the Larvae of Bancroftian Filariasis Vector MosquitoCulex quinquefasciatus

[摘要] Background & Objectives. The plan of this work was to study the larvicidal activity ofCassia occidentalis(Linn.) against the larvae ofCulex quinquefasciatus. These larvae are the most significant vectors. They transmit the parasites and pathogens which cause a deadly disease like filariasis, dengue,yellow fever, malaria, Japanese encephalitis, chikungunya, and so forth, which are considered harmful towards the population in tropic and subtropical regions.Methods.The preliminary laboratory trail was undertaken to determine the efficacy of petroleum ether and N-butanol extract of dried whole plant ofCassia occidentalis(Linn.)belonging to the family Caesalpiniaceae at various concentrations against the late third instar larvae ofCulex quinquefasciatusby following the WHO guidelines.Results. The results suggest that 100% mortality effect of petroleum ether and N-butanol extract ofCassia occidentalis(Linn.) was observed at200 and 300 ppm (parts per million). The results obviously showed use of plants in insect control as an alternative method for minimizing the noxious effect of some pesticide compounds on the environment. Thus the extract ofCassia occidentalis(Linn.) is claimed as more selective and biodegradable agent.Conclusion. This study justified that plantCassia occidentalis(Linn.) has a realistic mortality result for larvae of filarial vector. This is safe to individual and communities against mosquitoes. It is a natural weapon for mosquito control.

[学科分类] 神经科学