Riptortus pedestris (Fabricius) is one of major soybean pests in Korea. Its feeding during pod formation period significantly reduces the yield of soybean. Management tactics commonly used include insecticide such as etofenprox and aggregation pheromone trap, but they have been often found ineffective. As an alternative methods, parasitoids such as Gryon japonicum (Ashmead) and Ooencyrtus nezarae Ishii could be conserved by directly releasing non-viable host eggs in the field, by incorporating the non-viable host eggs into aggregation pheromone trap, by planting a trap crop of natural enemies, or by combining selective insecticides with a trap crop of natural enemies. I present study results of these tactics with discussion here.

• Un Taek Lim(Department of Plant Medicals, Andong National University)