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

作　　者：Azima Laili Hanifah Siti Hazar Awang Ho Tze Ming Suhaili Zainal Abidin Maizatul Hashima Omar 

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

出　　处：《Asian Pacific Journal of Tropical Biomedicine》2011年第5期365-369,共5页亚太热带生物医学杂志（英文版）

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.Objective:To examine the acaricidal effects of the essential oil of Cymbopogon citratus leaf extract(lemongrass) and ethanolic Azadirachta indica leaf extract(neem) against house dust mites Dermatophagoides farinae(D.farinae) and Dermatophagoides 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 mites.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 of lemongrass 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 

分 类 号：R285[医药卫生—中药学]