We are conducting research on mating disruption of the oriental beetle (OB), the major white grub species in turfgrass in New Jersey and surrounding areas. In 2002 and 2003, applications of a sprayable microencapsulated formulation of the OB sex pheromone (at 12.5 to 75 g ai/ha) about 1 wk after beginning of the flight resulted in 70 to 74% reduction of OB larval populations. To achieve this level of suppression a second application at the same rate had to be applied because captures of OB males in traps lured with OB sex pheromone indicated that the pheromone saturation of the treated areas had fallen below effective levels at 14 DAT. Shoes walked (1 DAT) through pheromone-treated areas (75 g ai/ha) became contaminated with pheromone and attracted high numbers of OB males. Another experiment showed that significant percentage of sprayed pheromone stayed attached to the grass foliage unless it was moved into the thatch and upper soil layers with 3 to 6 mm post-treatment irrigation. We will also present data from the 2004 field season during which two new sprayable and a granular formulations were tested (all at 1 x 25 g ai/ha) for OB suppression and shoe contamination.