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Rahman, M. M.,Lim, U. T. JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY 2017 Applied entomology and zoology Vol.52 No.3
<P>Aggregation pheromone traps designed to capture Riptortus pedestris (Fabricius) have recently been found to reduce neither the bug population nor crop damage in soybean fields. To improve trap efficiency, we first evaluated the effect of installation distance from the soybean field (trap distance). Additionally, push (one repellent) and pull (trap distance) strategies were evaluated together in a soybean field. While installation of aggregation pheromone traps 1 m outside of the field did not reduce the R. pedestris population at all, when the traps were moved to 5 m outside of the field, the field density of R. pedestris decreased, although this never became lower than when aggregation pheromone traps were absent. When the alarm pheromone was evaluated together with trap distance as a pull-push strategy in a soybean field, no additional reduction of the bug population was found compared to when only trap distance was changed. The number of bugs caught inside the aggregation pheromone traps was highest when traps were placed 10 m outside the field from August to October. In conclusion, despite some positive effect of installation distance, traps used both with and without alarm pheromone failed to reduce the bug population to the level found when traps were not used.</P>