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      저자 : Ahmed M. AL-MALKI (검색결과 1 건)
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        Inhibition of the growth and development of mosquito larvae of Culex pipiens L. (Diptera: Culicidae) treated with extract from flower of Matricaria chamomilla (Asteraceae)

        Fahd A. AL-MEKHLAFI,Nael Abutaha,Ahmed M. AL-MALKI,Muhammad AL-WADAAN 한국곤충학회 2020 Entomological Research Vol.50 No.3

        Mosquitoes can transfer many adverse diseases to human and animals therefore, there is a need to fight their spread. Among promising larvicidal sources is the use of plant extracts, which will play an important role in the future. This study was conducted to assess the larvicidal activity of Ferula hermonis Boiss,Achillea millefolium, Salvia officnalis, Psidium guaja and Matricaria chamomilla extract against Culex pipiens. The plant materials were extracted with hexane, dichloromethane, ethyl acetate, and methanol using a Soxhlet extractor. The extracts were evaluated for larvicidal activity against Cx. pipiens the mortality was monitored after 24 and 48 h of exposure. None of the extracts tested showed larvicidal acitivties except M. chamomilla. The ethyl acetate extract showed the most promising larvicidal activity with LC50 values of 287.1 and 209.4 ppm after 24 and 48 h of exposure, respectively. Treatment of the eggs with different concentrations of the active extract decreased the hatchability of the eggs dose dependently from 95 to 86.49%. Similarly, the pupal duration increased in treated groups. The larval period lasted for 12 d, whereas that of the control group lasted for 10 d. Furthermore, the pupal period lasted 3 d (control 2 d) in treated groups. The data also revealed a significant decrease in the growth index in treated groups (0.00–7.53) than that of the control (8.5). The GC–MS analysis revealed the presence of 1.6.10-dodecatriene, 7,11-dimethyl-3-methylene (89.68%), 1,6-cyclodecadiene, 1-methyl-5-methylene-8-(1-methylethyl)-, [S-(E,E)] (6.34%), 2H-pyran 3-ol (4.04%), and 2H-1-benzopyran-2-one (0.079%).

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