Evaluation of permethrin-impregnated mosquito-nets against mosquitoes in China.
In Yishan County, Guangxi Province, China, where malaria and Brugian filariasis are transmitted by vectors belonging to the Anopheles hyrcanus Pallas group, a study was conducted from June to November 1986 to evaluate the effectiveness of permethrin-impregnated mosquito bednets to reduce man/vector contact. In three experimental villages a total of 246 mosquito nets were treated with permethrin EC at a dosage of 0.5 g/m2. Control bioassays (1 h exposure) of treated nets gave up to 100% mortality of Armigeres subalbatus (Coquillett), Anopheles sinensis Wiedemann and Culex tritaeniorhynchus Giles for up to 19 weeks. During 5 months evaluation in the villages, permethrin-impregnated mosquito-nets reduced the number of mosquitoes found inside nets by 99.3% for Culex quinquefasciatus Say, by 94.4% for Anopheles sinensis Wiedemann and by 75% for Anopheles lesteri anthropophagus Xu & Feng. This measure could thus be considered an appropriate means of controlling vectors in villages.
Xu
J J
JJ
Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine (WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis), Shanghai.
Zao
M L
ML
Luo
X F
XF
Geng
R G
RG
Pan
S X
SX
Liu
S Y
SY
D000818:Animals; D001512:Bedding and Linens; D002681:China; D009033:Culicidae; D005260:Female; D006801:Humans; D007303:Insect Vectors; D007306:Insecticides; D009032:Mosquito Control / Q000379:methods*; D026023:Permethrin; D011722:Pyrethrins
D007306:Insecticides; D011722:Pyrethrins; D026023:Permethrin