EVALUATE THE ULV SPRAY EFFICIENCY AGAINST AEDES MOSQUITOES FOR PY...

4.4. Evaluate the ULV spray efficiency against Aedes mosquitoes For Pyrethroid insecticides, k-othrine 2EW has low effectiveness with 62.22% of Ae.aegypti mosquito falling after 60 minutes of spraying and the killing effect after 24 hours of spraying is only 67.56. %. The results can be seen that if using a insecticide with a single ingredient Deltamethrine 2% in the presence of a population of Ae.aegypti mosquitoes that are highly resistant to Pyrethroid insecticides, the insecticide effect will not meet the requirements with over 90%. mosquitoes die after 24 hours of spraying. The results of insecticide tests with Deltamethrin in Dien Khanh differ from some studies with ULV sprayed Deltamethrin and hot blind. Compared with research by author Nguyen Van Hoang (2015) experimented in Thanh Hoa spraying active insecticides to prevent and control dengue fever epidemic with community participation in two districts Hoang Hoa and Tinh Gia in 2014 for Results of mosquito density and BI index decreased and below the risk level after spraying with insecticide Hantox 200 (Deltamethrin 2%) and Permethrin 50EC compared to before spraying.