Tuesday, December 12, 2006
D0290

A soybean stink bug (Piezodorus hybneri) is attracted to a pheromone component of the bean bug (Riptortus clavatus) as well as its own pheromone

Nobuyuki Endo, enobu@affrc.go.jp1, Takashi Wada1, Keiichiro Matsukura1, Rikiya Sasaki2, and Shin-etsu Muto2. (1) National Agricultural Research Center for Kyushu Okinawa Region, 2421 Suya, Koshi, Kumamoto, Japan, (2) Fuji Flavor Co., Ltd., 3-5-8 Midorigaoka, Hamura, Tokyo, Japan

The stink bug, Piezodorus hybneri (Heteroptera: Pentatomidae) is an important soybean pest in South Japan. Male-produced pheromone system of P. hybneri has been elucidated as a mixture of three components. However nobody has checked the attractiveness of synthetic pheromone in the field. Recently, we found that P. hybneri was attracted to (E)-2-hexenyl (E)-2-hexenoate, one pheromone component of the bean bug, Riptortus clavatus (Heteroptera: Alydidae) which is also one of the predominant soybean bugs. We evaluated the attractiveness of the pheromone and (E)-2-hexenyl (E)-2-hexenoate in a soybean field. Synthetic P. hybneri pheromone attracted P. hybneri adults in the field. However, attractiveness of synthetic pheromone was less than that of (E)-2-hexenyl (E)-2-hexenoate alone. Though both sexes of adults were attracted to these baits, sex ratio of P. hybneri adults attracted to synthetic pheromone was female-biased, while almost equal numbers of both sexes were attracted to (E)-2-hexenyl (E)-2-hexenoate. These results suggest that attractiveness to P. hybneri may have different functions between P. hybneri pheromone and (E)-2-hexenyl (E)-2-hexenoate. We further discuss the differences of biological functions among these attractants.


Species 1: Hemiptera Pentatomidae Piezodorus hybneri (stink bug)
Species 2: Hemiptera Alydidae Riptortus clavatus (bean bug)