Five insecticides (Acrinathrin, Dinotefuran, Emamectin benzoate, Chlorfenapyr and fluxametamide) approved for tomato cultivation were evaluated in Frankliniella occidentalis populations collected from Chungcheong province (Cheongyang, Chungju and Gongju). Leaf dip bioassay was used to evaluate resistance levels (LC50). Bioassays on Acrinathrin demonstrated higher LC50 concentration in evaluated populations. In particular, the Chungju population was 745.61 times the recommended concentration of the insecticide. Other remarkable resistance levels were recorded for the Dinotefuran with 435.06 times and 196.29 times the recommended concentrations for the populations from Chungju and Gongju, respectively. Bioassays for Emamectin benzoate, Chlorfenapyr and Fluxametamide showed low resistance to insecticides in the evaluated populations.

• Rosmery Malory Noli Erquinio(Department of Ecological Science, Kyungpook National University, Sangju, Korea)
• Min Jae Kim(Department of Ecological Science, Kyungpook National University, Sangju, Korea)
• Ho Wook Lee(Department of Ecological Science, Kyungpook National University, Sangju, Korea)
• Hwang Bin Yu(Department of Ecological Science, Kyungpook National University, Sangju, Korea)
• Yi Seul Kim(Research Institute of Invertebrate Vector, Kyungpook National University, Sangju, Korea)
• Abraham Okki Mwamula(Research Institute of Invertebrate Vector, Kyungpook National University, Sangju, Korea)
• Dong Woon Lee(Department of Ecological Science, Kyungpook National University, Sangju, Korea, Research Institute of Invertebrate Vector, Kyungpook National University, Sangju, Korea) Corresponding author