Abstract
Species and their seasonal attractant prevalence were monitored by a synthetic pheromone trap of the oriental fruit moth, Graphorita molesta, from 1982 to 1984 in central Hokkaido. G. molesta adults were not captured by the pheromone trap in each point for each year. In contrast, the male adults of G. tenebrosana, G. dimorpha, Pammene nemorosa and Cnephasia cinereipalpana were captured by the pheromone trap of G. molesta. These species may utilize same-sex pheromone components. G. tenebrosana showed the first peak in mid-June, but the number of generations was not clear. G. dimorpha adults were not captured in large numbers by the pheromone trap. P. nemorosa showed two peaks from early to mid-June and mid-August. C. cinereipalpana adults were captured from mid-June to mid-August.