抄録
The synthetic pheromone of Riptortus pedestris (Heteroptera: Alydidae) attracts Piezodorus hybneri (Heteroptera: Pentatomidae) as well as conspecific insects, showing cross-species attraction. However, the attractiveness of live R. pedestris to P. hybneri has never been investigated. In this study, we compared the attractiveness of synthetic pheromone and males of R. pedestris to P. hybneri in soybean fields. Large numbers of P. hybneri were caught in a water-pan trap baited with the synthetic R. pedestris pheromone (50 mg). In contrast, very few P. hybneri were caught in a trap baited with R. pedestris (10 males), although a large number of R. pedestris were caught, which indicated that the R. pedestris males actually release their pheromone. Herein, we discuss this contradiction in attractiveness between the synthetic pheromone and male R. pedestris.
