Riptortus pedestris is a polyphagous species and an important pest of soybean. We investigated the phenology of R. pedestris at 14 locations - Jeonju, Naju, Goheung, Namhae, Milyang, Gunwi, Andong and 7 areas of Jeju. Commercial pheromone monitoring traps were used. The traps were baited with lures containing a 1:5:1 ratio of myristyl isobutyrate, (E)-2-hexenyl (E)-2 hexenoate and (E)-2-hexenyl (Z)-3-hexenoate. There was difference the first adult catch and nymph emergence among locations. To develop spring emergence distribution pattern, we used the trap data from each location. Spring emergence by sampling date was cumulated and analyzed relative to the Julian date using Weibull distribution function.

• Jeong Joon Ahn(Research Institute of Climate Change and Agriculture, National Institute of Horticultural and Herbal Science, RDA, Jeju)
• Kyoung San Choi(Research Institute of Climate Change and Agriculture, National Institute of Horticultural and Herbal Science, RDA, Jeju)
• Sang Wook Kho(Research Institute of Climate Change and Agriculture, National Institute of Horticultural and Herbal Science, RDA, Jeju)