The two-spotted spider mite, Tetranychus urticae Koch, is one of the most important agricultural pests. Therefore, we screened fifteen compounds from natural products for their spatial repellent and oviposition deterrent activities against T. urticae in the laboratory by using two-choice and no-choice tests. In the bridge two-choice test, nine compounds showed the spatial repellent effects on T. urticae at 20 mg dose, resulting in reduced numbers of eggs. Among the nine compounds, at 2 mg dose, two compounds were selected as having more spatial repellent activity than the others. The two compounds also showed spatial repellent and oviposition deterrent effects in the two-choice test from hosts. In the no-choice test from a host, the spatial repellent effects of the two compounds to T. urticae were significantly stronger than that of controls. These results suggest that the findings can be used as potential agents for the prevention and population control of T. urticae in the field.

• Ji Hye Oh(Department of Plant Medicine, Gyeongsang National University) Corresponding author
• Ryeo Eun Kim(Department of Plant Medicine, Gyeongsang National University) Corresponding author
• Dong Hee Kim(Department of Plant Medicine, Gyeongsang National University)
• Yee Un Woo(Department of Plant Medicine, Gyeongsang National University)
• Hyeon Gu Kim(Department of Plant Medicine, Gyeongsang National University)
• Sung Youn Jo(Department of Plant Medicine, Gyeongsang National University)
• Eun Su Jang(Department of Plant Medicine, Gyeongsang National University)
• Beom Gyu Cho(Department of Plant Medicine, Gyeongsang National University)
• Gwang Hyun Roh(Department of Plant Medicine, Gyeongsang National University, Institute of Agriculture and Life Science, Gyeongsang National University)