title: Studies on effects of Pelargonium citrosa leaf extracts on malarial vector, Anopheles stephensi Liston.
abstract: Methanol extracts of Pelargonium citrosa leaf were tested for their biological, larvicidal, pupicidal, adulticidal, antiovipositional activity, repellency and biting deterrency against Anopheles stephensi. Larval mortality was dose dependent with the highest dose of 4% plant extract evoking 98% mortality. The extracts affected pupicidal and adulticidal activity and significantly decreased fecundity and longevity of A. stephensi. The larval, pupal and adult development were completely inhibited by the treatment. At 4% the extracts evoked strong repellent action. They also interfered with oviposition, egg hatchability, and exhibited a growth inhibiting effect against larvae and good repellency against adults of A. stephensi. The leaf extract treatment significantly enhanced biting deterrency. As naturally occurring insecticides, these plant derived materials could be useful as an alternative for synthetic insecticides controlling field populations of mosquitoes.
authors.affiliation: Department of Zoology, Bharathiar University, Coimbatore 641 046, India. drjeyabalan@yahoo.com
authors.forename: D
authors.initials: D
authors.lastname: Jeyabalan
authors.forename: N
authors.initials: N
authors.lastname: Arul
authors.forename: P
authors.initials: P
authors.lastname: Thangamathi
mesh_terms: D000818:Animals; D000852:Anopheles; D007300:Insect Control; D007306:Insecticides / Q000494:pharmacology*; D007814:Larva; D010058:Oviposition / Q000187:drug effects; D010063:Ovum / Q000187:drug effects / Q000502:physiology; D031316:Pelargonium / Q000737:chemistry*; D010936:Plant Extracts / Q000494:pharmacology; D018515:Plant Leaves; D018675:Toxicity Tests
chemical_list: D007306:Insecticides; D010936:Plant Extracts