Insecticide Susceptibility of Aedes Aegypti in Lop Buri, Phetchaburi, Prachin Buri, Surat Thani and Bangkok, Thailand - การทดสอบความไวของยุงลายบ้านต่อสารเคมีกำจัดแมลงจังหวดลพบุรี เพชรบุรี ปราจีนบุรี สุราษฎร์ธานีและกรุงเทพมหานคร

Abstract

              Aedes aegypti is the main vector of Dengue Haemorrhagic Fever (DHF). Surveillance and monitoring of the level of resistance to insecticide used in mosquito control is very important. The purpose of this study is to test the susceptibility status of the Aedes aegypti larval and adult to the pyrethroid and organophosphate group. The result of the Aedes aegypti larval susceptibility test to different concentrationed of temephos, based on the death number at twenty-forth hour (bioassay WHO,1996) shows that temephos’s terminating effectiveness in Lop Buri, Phetchaburi, Prachin Buri, Surat Thani and Bangkok displays LC50 value at 0.00659, 0.00336, 0.00249, 0.00276 and 0.00496 ppm. respectively and displays LC95 value at 0.01574, 0.00770, 0.00794, 0.00826 and 0.01078 ppm. respectively. The result of Aedes aegypti susceptibility status using WHO test kit and paper soaked in diagnostic dose of deltamethrin 0.05 percent, cyfluthrin 0.15 percent, permethrin 0.75 percent and malathion 5 percent showed that Lop Buri, Phetchaburi were susceptible to deltamethrin, cyfluthrin, and malathion and tolerant to permethrin. Prachin Buri was susceptible to deltamethrin and malathion, tolerant to cyfluthrin and resistant to permethrin. Surat Thani was susceptible to malthion, tolerant to deltamethrin and cyfluthrin and resistant to permethrin. Bangkok was susceptible to deltamethrin and cyfluthrin, tolerant to malathion and resistant to permethrin. These data may be useful in planning the use of insecticide in order to yield the most effective result per area.

Key words: Aedes aegypti, susceptibility test, chemical insecticide