Yellow flower thrips (WFT), Frankliniella occidentalis is mainly controlled using chemical control methods. But the continuous use of chemical pesticides in greenhouse may contribute to development of insecticide resistance. Therefore, in this study, we evaluated the insecticidal activity of eleven insecticides against the WFT occurring in greenhouse pepper cultivation in the Gyeonggi province. The results showed no resistance in treatments with emamectin benzoate, fluxametamide, and flometoquin while high levels of resistance were recorded in treatments with acrinathrin, acetamiprid, and dinotefuran. The Anseong and Yeoju population was more resistant against spinetoram and chlorfluazuron, respectively, than populations from other regions.

• Kyeong Woo Kim(Department of Ecological Science, Kyungpook National University, Sangju, Korea)
• Hwang Bin Yu(Department of Ecological Science, Kyungpook National University, Sangju, Korea)
• Ho Wook Lee(Department of Ecological Science, Kyungpook National University, Sangju, Korea)
• Min Jae Kim(Department of Ecological Science, Kyungpook National University, Sangju, Korea)
• Rosmery Malory Noli Erquinio(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)
• DongWoon Lee(Department of Ecological Science, Kyungpook National University, Sangju, Korea, Research Institute of Invertebrate Vector, Kyungpook National University, Sangju, Korea) Corresponding author