Argyrotaenia sphaleropa (Meyrick) has been leading to significative damage in cultivated fruits such as persimmon, peach and grape in Southern Brazil. In the present work, the response of A. sphaleropa males to different formulations and doses of the synthetic sexual pheromone was evaluated, as well as the duration of the most efficient formulations under field conditions. Formulations containing Z11,13-14Ac + Z11,13-14Al + Z11-14Al (4:4:1), Z11,13-14Al + Z11,13-14Ac (9: 1) and Z11,13-14Ac + Z11,13-14Al (9: 1) (1.0 mg/ dispenser) were the most efficient as male attractants when compared to unmated females. The concentration of 1.0 mg/ dispenser was significantly more attractive than the 0.1 mg/ dispenser for the three formulations. The formulation Z11,13-14Ac + Z11,13-14Al + Z11-14Al (4:4:1), at 1.0 mg/dispenser, was efficient for at least 75 days, while the attractiveness of Z11,13-14Ac + Z11,13-14Al (9:1) lasted 60 days. Further field experiments should employ the formulation Z11,13-14Ac + Z11,13-14Al + Z11-14Al (4:4:1) at 1.0 mg/dispenser, being dispensers replaced at 75-days intervals.
Blend; dose; age of dispenser
