Acaricide resistance status of Panonychus citri (Acari: Tetranychidae) collected from citrus orchards in Adana, Turkey

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Abstract: In this study, resistance status of ten different Panonychus citri populations collected from citrus orchards in Adana, Turkey, were determined against etoxazole, spirodiclofen and spirotetramat using bioassay and biochemical tests. A leaf-disc method was used to determine LC50 and LC90 values of different P. citri populations. According to the results, resistance status of P. citri populations varied based on the location due to different spray frequency. Based on LC50 values of the tested populations, 1.22-18.35, 1.23-40.43 and 1.76-27.50-fold resistance were determined against etoxazole, spirodiclofen and spirotetramat, respectively. Results of photometric enzyme assays showed that esterase and GST enzymes may be involved in detoxification of etoxazole, spirodiclofen and spirotetramat in P. citri.

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