This study was conducted to determine the effect of six different leguminous seeds a) cowpea, b) white kidney bean c) soybean (Cheongja) d) soybean (Daepung) e) mung bean and f) azuki bean on the nymphal development, mortality, adult longevity, fecundity and hatchability of Riptortus pedestris (F.) (Hemiptera: Alydidae). Total developmental time ranged from 18 to 25 days; R. pedestris fed on white kidney bean took the longest time. There was no difference in mortality among the bugs fed on the legumes except those fed on white kidney bean which had the highest mortality (94%). Also, adult bugs fed on white kidney bean showed the shortest longevity. Total number of eggs laid by adult female and the hatchability of the eggs were highest from the bugs fed on cowpea. Higher reproductive success of R. pedestris fed on cowpea suggests that cowpea could be very suitable legume for the bug and it can be used as a trap crop against the bean bug.

• Bishwo P. Mainali(Department of Functional Crop, National Inst. of Crop Science, RDA, Korea)
• Soon Do Bae(Department of Functional Crop, National Inst. of Crop Science, RDA, Korea)
• Hyun Ju Kim(Department of Functional Crop, National Inst. of Crop Science, RDA, Korea)
• Young Nam Yoon(Department of Functional Crop, National Inst. of Crop Science, RDA, Korea)
• In Seok Oh(Department of Functional Crop, National Inst. of Crop Science, RDA, Korea)