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Acaricidal activity of Cymbopogon citratus and Azadirachta indica against house dust mites

查看全文 作　　者：Azima Laili [1]Hanifah;Siti Hazar [1]Awang;Ho Tze [1]Ming;Suhaili Zainal [1]Abidin;Maizatul Hashima [2]Omar 高影响力作者 机构地区：[1]Acarology Unit,Infectious Disease Research Center,Institute for Medical Research,Jalan Pahang;[2]Phytochemistry Unit,Herbal Medical Research Center,Institute for Medical Research,Jalan Pahang高影响力机构 出　　处：《Asian Pacific Journal of Tropical Biomedicine》索引2011年第1卷第5期,共5页高影响力期刊 摘　　要：Objective:To examine the acaricidal effects of the essential oil of Cymbopogon citratits leaf extract(lemongrass)and ethanolic Azadirachta indica leaf extract(neem)against house dust mites Dermatophagoides farinae(D.farinae)and Dermalophagoides pteronyssinus(D.pteronyssinus).Methods:Twenty-five adults mites were placed onto treated filter paper that is soaked with plant extract and been tested at different concentrations(50.00%,25.00%,12.50%,6.25%and 3.13%)and exposure times(24hrs,48hrs,72hrs and 96 hrs).All treatments were replicated 7 times,and the experiment repeated once.The topical and contact activities of the two herbs were investigated.Results:Mortalities from lemongrass extract were higher than neem for both topical and contact activities.At 50%concentration,both 24 hrs topical and contact exposures to lemongrass resulted in more than 91%mortalities for both species of inites.At the same concentration and exposure time,neem resulted in topical mortalities of 40.3%and 15.7%against D.pteronyssinus and D.farinae respectively;contact mortalities were 8.0%and 8.9%against the 2 mites,respectively.There was no difference in topical mortalities of D.pteronyssinus from exposure to concentrations oflemongrass and neem up to 12.50%;lemongrass was more effective than neem at the higher concentrations.Conclusions:Generally,topical mortalities of D.farinae due to lemongrass are higher than that due to neem.Contact mortalities of lemongrass are always higher that neem against both species of mites. 关 键 词：Acaricidal LEMONGRASS NEEM House dust MITES CYMBOPOGON citratus AZADIRACHTA indica DERMATOPHAGOIDES farinae DERMATOPHAGOIDES pteronyssinus
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