The pheromone (E,Z)-2,13-octadecadien-1 ol acetate [called (E,Z)-2,13-ODDA] or (Z,Z)-3,13-octadecadien-1 ol acetate [called (Z,Z)-3,13-ODDA; the main component of the peachtree borer,Synanthedon exitiosa(Say), sex pheromone and mating disruption dispenser] was released into the air from Shin-Etsu ropes (254 per hectare [100 per acre]) in whole bunch grape vineyards and compared with untreated vineyards using a randomized block design (four replicates). Pherocon IC traps baited with a 99:1 blend of (E,Z)-2,13-ODDA:(Z,Z)-3,13-ODDA were used to monitor the seasonal number of grape root borer males,Vitacea polistiformis(Harris). These trap captures were significantly reduced by 99.1 and 87.5% in the vineyards treated with (E,Z)-2,13-ODDA and (Z,Z)-3,13-ODDA, respectively, compared with the untreated vineyard mean capture of 134.0 males. The (Z,Z)-3,13-ODDA-treated vineyards realized a mean grape root borer pupal skin reduction of 92.7% over a 2-yr period (life cycle), which was significantly different than the mean count from the untreated vineyards (17.2% increase). The mean pupal skin count reduction of 65.7% from the (E,Z)-2,13-ODDA-treated vineyards was not significantly different from either the (Z,Z)-3,13-ODDA-treated or untreated vineyards. This lower mean reduction was attributed to only one (E,Z)-2,13-ODDA-treated vineyard that probably experienced immigration of mated feral females from an untreated vineyard 200 m to the southwest. It appears that placement of 254 ties per hectare per season of either compound alone in isolated vineyards with a low to moderate population of grape root borers may be an effective and environmentally safe alternative to insecticide treatments for control of the grape root borer.