First report on mild insecticide resistance in newly established Aegean Aedes albopictus populations of Turkey

Abstract

The invasive nature of Aedes albopictus, a competent vector of dengue, zika, yellow fever, and chikungunya viruses, has spreadto many parts of the world. To date, there have been no report regarding the insecticide resistance status of Aedes albopictus populationsalong the Aegean coasts of Turkey. This study aims to confirm the occurrence of Aedes albopictus populations in the Aegean region ofTurkey and test their susceptibility against different insecticide classes. Bioassay for susceptibility to Dikloro difenil trikloroetan (DDT)(4%), propoxur (0.1%), fenitrothion (1%), bendiocarb (0.1%), permethrin (0.75%), and deltamethrin (0.05%) of each population wasassessed through the World Health Organization (WHO) standard bioassay test. A total of 675 adult Aedes albopictus samples wereanalysed from four populations in addition to control group and laboratory population. Results showed that all of the populationswere resistant or at least possible resistant to DDT. In addition to that, all of the populations showed susceptibility against bendiocarb,propoxur, and fenitrothion except the Didim population, which is a possible resistant to propoxur and fenitrothion and the Bodrumpopulation which is a possible resistant to fenitrothion. Results also indicated reduced mortality against permethrin in the Kuşadası andGüzelçamlı populations, while all of the populations were susceptible to deltamethrin. This study might help public health authoritiesto choose proper insecticide in control activities before insecticide resistance spread other populations and fix in these populations.