Riptortus pedestris is an important soybean pest in Korea and Japan. Aggregation pheromone traps were evaluated in 12 soybean fields in Andong using three treatments of trap installation, i.e., installation for whole cultivation period, installation up to September, and no installation. The number of R. pedestris (in all life stages) were not significantly different among the treatments until October, but its abundance significantly increased at mid October in the fields where traps were installed. Trap catch of R. pedestris was relatively higher in August while bug population was low in the fields. However, in fall, R. pedestris populations become abundant in the fields while trap catch was low. There was no significant difference in parasitism as well as seed and pod damage among the treatments. In conclusion, aggregation pheromone trap should’nt be used as control measure, but can be used as a monitoring tool of R. pedestris population up to August in soybean field.

• M. Mahbubur Rahman(Department of Bioresource Sciences (BK+), Andong National University)
• Eunmok Kim(Department of Bioresource Sciences (BK+), Andong National University)
• Mohammad M. H. Bhuyain(Department of Bioresource Sciences (BK+), Andong National University)
• Dongmok Kim(Department of Bioresource Sciences (BK+), Andong National University)
• Un Taek Lim(Department of Bioresource Sciences (BK+), Andong National University)