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Abstract
Field observations of virgin female grape root borers (Vitacea polistiformis Harris) were made throughout daylight periods under different pheromone treatments and doses. The pheromone compounds used were: the grape root borer pheromone, a 99:1 blend of E,Z-2,13-octadecadien-l-ol acetate (EZ) and Z,Z-3,13-octadecadien-l-ol acetate (ZZ); EZ alone; and ZZ alone. Two different pheromone dispensers were used – rubber septa and Shin-Etzu twist-tie ropes. Treatments with 99:1 EZ: ZZ and 100% ZZ significantly reduced the ability of females to attract a mate. Shin-Etzu ropes were the most effective dispenser for prevention of mating.
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