ARCHIVES
VOL. 6, ISSUE 5 (2021)
Larvicidal potency of selected native flora extracts against mosquito vector, Culex pipiens molestus forskal (Diptera: Culicidae)
Authors
Atallah F Mekhlif
Abstract
The present study evaluated the larvicidal efficiency of selected known poisonous and medicinal local plants against C. pipiens molestus. Also, estimation of residual action of the applied extracts by means of degradation time in the ecosystem. Ethanolic extract of inflorescences Arum dioscoridis (Ad), Conium maculatus (Cm) unripe seeds and Ricinus communis (Rc) and Papaver rhoeas (Pr) seeds were tested against C. pipiens molestus (L3) after WHO larval susceptibility protocol. According to mortality data, LC50 and LC90 had been estimated. Residual action test was continued for 24 days, beginning with the concentration caused 100% mortality after three days of treatment. Pyrethroid insecticide Acicam 5 D as positive control was used. Minimum lethal concentration of 50% treated larvae (LC50) value at 24 and 48 hrs. Was showed by A. dioscoridis (23.0, 17.0 ppm) followed by C. maculatus (77.0, 22.0 pm), R. communis (92.0, 14.0 ppm), P. rhoeas (116.0, 37.0 ppm) and 112.0 and 26.0 ppm for +ve control. Otherwise, LC90 at 24 and 48 hrs; 92.0 and 68.0 ppm for A. dioscoridis followed by C. maculatus (220.0, 157.0 ppm), R. communis, (245.0, 163.0 ppm) and P. rhoeas (270.0, 201.0 ppm), while 161.0 and 121.0 ppm for +ve control. The residual action was significantly decreased according to plant extract species and exposure time, and became less than 50% at 12th – day for P. rhoeas and A. dioscoridis, 15th – day for R. communis and after three weeks for C. maculatus. The mosquito, C. pipiens molestus larvae are more susceptible to extracts of A. dioscoridis, C. maculatus and R. communis than the insecticide Cypemthrin (Acicam 5 D). A. dioscoridis and R. communis were firstly tested their larvicidal activity against Culex pipiens molestus and other insects. The tested plants can give promising option in mosquito control and environmental pollution avoidance.
Download
Pages:207-211
How to cite this article:
Atallah F Mekhlif "Larvicidal potency of selected native flora extracts against mosquito vector, <em>Culex pipiens molestus </em>forskal (Diptera: Culicidae) ". International Journal of Entomology Research, Vol 6, Issue 5, 2021, Pages 207-211
Download Author Certificate
Please enter the email address corresponding to this article submission to download your certificate.