Evaluation of Thermal Fog Generators to Control Aedes mosquitoes of Local Administration Organizations in Phutthaisong District, Buriram Province, Year 2021.

Abstract

A cross-sectional study was done to evaluate thermal fog generators to control Aedes mosquitoes. A total of 8 Local Administration Organizations in Phutthaisong District, Buriram Province were sampled on purpose. The readiness of thermal fog generators and chemical solution flow rate were checked. This study evaluated 3 aspects which were 1) Temperature at the nozzle of thermal fog generators 2) Volume median diameter of the chemical droplet, and 3) Span value. The study was done between May and September 2021. Descriptive statistics were applied for analyzing the data. Seventeen thermal fog generators were examined. There were 3 brands of those generators, “trade name 1” about 9 generators (52.94%), “trade name 2” about 7 generators (41.18%), and “trade name 3” about 1 generator (5.88%). Eleven (64.71%) generators smoothly functioned for at least 3 minutes. Six of 11 generators (54.55%) had a chemical solution flow rate between 20.5-67.5 liters/hour. The results evaluation of thermal fog generators showed 1) 9 out of 11 generators (81.82%) had the appropriate temperature at the nozzle (600 -1000 ˚C.) 2) 6 out of 11 generators (54.55%) produced standard droplet size (volume median diameter ≤ 30 µm) and 3) range of droplet size (Span value < 2). A total of 4 out of 11 (36.36%) had the standard for all 3 aspects. In conclusion, only a part of examined thermal fog generators had a good function standard. Therefore, Local Administration Organizations might have to regularly maintain those generators and regularly examine by technical to control adult Aedes mosquitoes using thermal fog generators.