Larvicidal Activity of Water Extracts of Ten Egyptian Plants against Culex quinquefasciatus Say (Diptera: Culicidae) Larvae Collected from Zaria in Nigeria (original) (raw)

Larvicidal activity studies of different concentrations (5.000, 2.500, 1.250, 0.625 and 0.3125 mg/ml)of water extracts of ten Egyptian plants (Nigella sativa, Pimpinella anisum, Trigonella foenum graecum, Artemisia monosperma, Cuminum cyminum, Cinnamomum sp., Moringa olifera, Syzygium aromaticum (Caryphyllus aromaticus), Punica granatum, Cassia fistula) were carried out against the 3 rd instar larvae of Culex quinquefasciatus. Results indicated that, all water extracts of these plants under investigation are larvicidal agents at the studied concentrations (5.000, 2.500, 1.250, 0.625 and 0.3125 mg/ml) against the larvae, with special reference to Cuminum cyminum (% of mortality = 84.444±0.001, 64.444±0.000, 48.889±0.001, 28.889±0.001 and 22.222±0.001 respectively, LC50=1.946±0.001 and LC80=3.114 ±0.001 mg), followed by Pimpinella anisum (% of mortality = 53.333±0.001, 40.000±0.000, 26.667±0.001, 22.222±0.001 and 17.778±0.001 respectively, LC50=3.028±0.001 and LC80=4.844±0.001 mg). The least effect was obtained by Cinnamomum sp. (% of mortality = 17.777±0.001, 13.333±0.000, 8.889±0.001, 6.667±0.001 and 4.444±0.001 respectively, LC50=9.479±0.001 and LC80=15.166±0.001 mg)