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RISS 인기검색어
- 검색키워드
- 저자 : Hossam El-Din M. Zahran (검색결과 2 건)
- 무료
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Adulticidal, larvicidal and biochemical properties of essential oils against Culex pipiens L
Hossam El-Din M. Zahran,Hamdy K. Abou-Taleb,Samir A.M. Abdelgaleil 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.1
In this study, the insecticidal properties of sixteen essential oils isolated from Egyptian plants were evaluated against the fourth instar larvae and adults of Culex pipiens L. The inhibitory effects of most active essential oils on the activity of acetylcholinesterase (AChE) and adenosine triphosphatases (ATPases) were also tested. In larvicidal assay against Cx. pipiens, the oils of Artemisiamonosperma, S. terebinthifolius and Origanumvulgare showed the highest insecticidal activity with LC50 values of 7.73, 8.14 and 8.40 mg/l after 24 h of treatment and 2.63, 3.46 and 6.74mg/l after 48 h of treatment.On the contrary, the oils of Schinusmolle and Rosmarinus officinalis were the less effective. The results of fumigant toxicity assay against the adults of Cx. pipiens revealed that the tested oils had remarkable toxicity based on their LC50 valueswhich ranged between 0.06 and 12.84 mg/l. The oil of Artemisia judaicawas the most activewith an estimated LC50 value of 0.06mg/l air after 24 h of treatment, while the oil of Citrus paradisi was less active. The essential oils of A. monosperma, O. vulgare, S. terebinthifolius and C. paradisi elicitedmarked enzymatic inhibition towards AChE and ATPases isolated fromCx. pipiens larvae. These results indicated that the essential oils have potential for the development of natural larvicides and fumigants for Cx. pipiens control.
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Hossam El-Din M. Zahran,Samir A.M. Abdelgaleil 한국응용곤충학회 2011 Journal of Asia-Pacific Entomology Vol.14 No.1
Twelve monoterpenes were evaluated for larvicidal and adulticidal activities towards Culex pipiens. Geraniol and cuminaldehyde were the most toxic monoterpenes to larvae, with LC_50 values of 38.6 and 38.9 mg/l after 24 h of treatment, respectively, whereas cuminaldehyde was the most potent compound after 48 h of treatment, followed by geraniol and thymol. In fumigant toxicity experiments, (R)-carvone and geraniol were the most toxic monoterpenes against the adults at all three tested concentrations and after both 24 and 48 h. When tested at sublethal concentrations (0.5 LC_50), (R)-carvone, (S)-limonene and cuminaldehyde decreased hatchability, pupation and adult emergence and induced high larval mortality. Our results suggest that geraniol, cuminaldehyde and (R)-carvone are promising toxicants against Culex pipiens and could be useful in the search for new natural insecticides.
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