We evaluated the efficiency of a pheromone trap for monitoring the sorghum plant bug, Stenotus rubrovittatus. The most effective trap position in a paddy field was ≥7 m inside the field's edge. We also evaluated the pheromone trap as an alternative to capture by sweeping. The number of males captured in traps increased before the increase by sweeping three paddy fields. These results suggest that the pheromone trap can be utilized as a tool to support the decision for control or damage estimation of S. rubrovittatus in the early stage of insect invasion into paddy fields.
