Rapid resistance detection of resistance level is most important step to manage the resistant population in Tetranychus urticae in Korea. Residual contact vial bioassay (RCV) and quantitative sequencing (QS) methods were employed to determine the resistance level and applied to measure the resistance level of 46 field population collected from rose, strawberry and apple trees. Most populations exhibited multiple resistance pattern to various types of acaricides. Especially, the resistance levels in mites from rose cultivation area were higher than those from strawberry and apple cultivation areas. The resistance level detection would provide a useful parameter enabling the proactive action for a proper resistant population management for T. urticae.

• Deok Ho Kwon(Research Institute of Agriculture and Life Sciences, Seoul National University)
• Taek Joon Kang(National Institute of Horticultural & Herbal Science, Rural Development Administration)
• Si Hyeock Lee(Research Institute of Agriculture and Life Sciences, Seoul National University Department of Agricultural Biotechnology, Seoul National University)