Fish Materials as Potent Attractants for the Male of Bean Bug, Riptortus clavatus

Fish materials were tested for their attractiveness to the bean bug, Riptortus clavatus (Thun-berg) (Heteroptera: Alydidae) in a soybean field. Fish materials' volatiles evoked male-specific responses in attractiveness. Fish materials such as mackerel, hairtail, and gizzard shad attracted significantly higher number of males than control, but they were not attractive to females. The attractiveness of MeOH extract of mackerel to R. clavatus males was not different from 10 live males and aggregation phe-romone traps of R. clavatus. Further studies are needed to identify volatile compound(s) from fish smell responsible for the attraction of R. clavatus males.