Insecticide resistance status in Aedes Albopictus (Skuse, 1894), (Diptera: Culicidae) populations after the first invasion of Türkiye during two years

An invasive Aedes Albopictus (Skuse, 1894) (Diptera: Culicidae) is considered one of the most crucial disease vectors. In this study, we aimed to monitor gradual changes in insecticide resistance profiles of Ae. Albopictus populations have recently invaded the Turkish territory. We collected Ae. Albopictus specimen from ten localities in the Black Sea, Marmara and Aegean regions in subsequent years. Adult Ae. Albopictus insecticide susceptibility to deltamethrin (0.05%), cyfluthrin (0.15%), etofenprox (0.5%), bendiocarb (0.1%), fenitrothion (1%) and dichloro diphenyl trikloroetan (DDT) (4%) was determined by the susceptibility test of World Health Organisation. Results showed common pyrethroid susceptibility. Bendiocarb and fenitrothion resistance was more common in the study. Interestingly, DDT resistance was still high in some populations despite the prohibition of the insecticide in Türkiye. A comparison of resistance status in two years demonstrated that populations were not under pyrethroid selection pressure in the study area. The fact that the bendiocarb and fenitrothion resistance, which was present when the populations were first established, continues after two years, demonstrates that the populations are under selection pressure in the study area. We believe that the findings in the study would help resistance management which is a major component of Ae. Albopictus control efforts.