Abstract
The attractiveness of synthetic pheromone for the black cutworm, Agrotis ipsilon, had been monitored by sticky trap from 1992 to 1995 in southern Hokkaido. A. ipsilon adults were captured during from May to early July and during from late July to early September. Although this moth was not captured in large numbers by light trap, the total catch by pheromone trap was 1.8 to 8.6 times more than that by light trap (high pressure mercury light, 100W). Pheromone trap was more efficient for population monitering than light trap. In 1995, the attractiveness of three dosages of synthetic pheromone (0.2, 1, 3 mg per rubber septam) was assessed in field. lmg dosage of synthetic pheromone per rubber septam was suitable for monitoring A. ipsilon at low population densities. In theses tests, Macdunnoughia confusa adults were caught by pheromone trap of A. ipsilon. It was considered that M. confusa might utilize the same sex pheromone components.
