Laboratory studies of adultPiezodorus guildiniifeeding on the seeds or pods of five legumes demonstrated that this polyphagous stink bug exhibits differences in reproductive parameters, survival, longevity and body weight depending on food source. Results of these laboratory studies, coupled with previous field observations, suggest thatIndigofera hirsutaandCrotalaria lanceolataserve as important wild hosts in the seasonal phenology ofP. guildinii.