Studies on biological activity of endemic medicinal plants in the nigiri hills against the filarial vector, culex quinquefasciatus (say) (diptera: culicidae)

In the present study the methanolic extract of Artocarpus hirsutus Lam., Cinnamomum wightii Meisner, Diopyros paniculata Dalz., Garcinia gummi-gutta (L.) Robs. Garcinia indica Choiss, Michelia nilagrica Zenk. Rhododendron arboreum (Zenk.) Tagg.) leaves were evaluated against Culex quinquefasciatus. Artocarpus hirsutus, Cinnamomum wightii, Diopyros paniculata, Garcinia gummi-gutta, Garcinia indica, Michelia nilagrica and Rhododendron arboreum leaves extract were tested for their biological, larvicidal, pupicidal, antiovipositional activity, repellency and deformities against Culex quinquefasciatus. The larval, pupal and adult mortality were increased significantly with increasing levels of plants leaves extract concentrations. The adult emergency also significantly affects by the treatment of all the plant leaves extract. The larval and pupal duration were extended by the treatment of all the plant leaves extract. Adult longevity and fecundity were greatly reduced after the treatment of plant extracts. At 4% the Diopyros paniculata leaves extract showed strong oviposional deterrency. The Diopyros paniculata leaves extract treatment significantly enhanced repellency activity.