Abstract
Mass trapping trials for control of the oriental fruit moth, Grapholitha molesta Busck, were conducted for two seasons. In 1974, it was confirmed that more male moths are normally captured by traps bordering the orchard than those in the interior. The effectiveness of mass trapping in these trials varied with field population density. Greater numbers of moths were trapped late in the season, during the fourth and fifth generations. Mean young shoot injuries per tree in the mass trapped area at the end of July were 38.9 and 60.4 in 1974 and 1975, respectively. In the check, these figures were 88.8 to 133 and 57.3 to 122.3, respectively.
