The ovicidal effect of plant extract mixture (5% cinnamon extract + 10% citronella oil + 30% citrus oil + 10% derris extract + 20% neem extract + 25% penetrating surfactant) against several major insect pests was tested using the spraying method. In the case of stink bugs, eggs tended to die during hatching. When treated with a plant extract mixture (500-times solution), mortality for Halyomorpha halys, Riptortus clavatus, Eurydema dominulus, Trialeurodes vaprarorium, Bemisia tabaci, Spodoptera exigua, and Agrotis ipsilon reached as high as 100%. Therefore, it is believed that industrialization will be feasible in the future.

• Hee-A Lee(Department of Environmental Agriculture Research, Gyeonggi-do Agricultural Research and Extension Services)
• Young Su Lee(Department of Environmental Agriculture Research, Gyeonggi-do Agricultural Research and Extension Services)
• So-Hee Kim(Department of Environmental Agriculture Research, Gyeonggi-do Agricultural Research and Extension Services)
• Jong Yoon Choi(Department of Environmental Agriculture Research, Gyeonggi-do Agricultural Research and Extension Services)
• Ju-Hyung Yoo(Department of Environmental Agriculture Research, Gyeonggi-do Agricultural Research and Extension Services)
• Hyun Ju Lee(Department of Environmental Agriculture Research, Gyeonggi-do Agricultural Research and Extension Services)