Title: Monitoring of resistance of Anopheles sinensis to normal insecticide
Abstract: Objective To monitor the resistance of Anopheles sinensis to DDT,deltamethrin,cyfluthrin and malathion . Methods Adult Anopheles were captured with filter contact method recommended by WHO and the knockdown rate,the knockdown time and mortality of the first Anopheles and the resistance level were observed. Results The Anti-knockdown capability of Anopheles sinensis to DDT was the highest in the areas of Guangshui,Jingshan and Xiangyang,the knockdown rate of their discrimination dosage were 4.86%、0.00 and 0.00 respectively,the knockdown time of the first Anopheles were 24min,over 60min and over 60min respectively. the Anti-knockdown capability of Anopheles sinensis to deltamethrin and cyfluthrin was higher in areas of Guangshui,Jingshan,Xiangyang,the knockdown rate were 10.31% ,2.91% ,3.12% and 15.00% ,4.90% ,2.16% respectively,the knockdown time of the first Anopheles were 19,25,32min and 20,5,33min respectively. The Anopheles was highly resisitant to DDT,deltamethrin and cyfluthrin,their discrimanation dosage mortality were all less than 50% ,the mortality of malathion were 58.66% ,10.20% and 25.23% respectively。 the resistance of Anopheles sinensis to deltamethrin raised 2 resisitance levels than that in 1993 duing which the resistance to malathion raised 1 resisitance level. The resistance to DDT was still higher. Conclusion The resistance to deltamethrin of Anopheles sinensis is developing quickly,the resistande to DDT is still increasing,which could be the obstacle in vector control,thus the monitoring work be strengthened.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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