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An attracticide, based on sex pheromone and permethrin, was tested in an unsprayed apple orchard to determine the potential for Epiphyas postvittana male moth population suppression. Three treatments, control, attracticide and caged attracticide (both 450 droplets per ha) were placed in 0.3 ha plots (n = 6 replicates). Droplets were caged in one treatment to prevent access by male moths. Two traps, baited with attracticide droplets and placed on the centre row at 30 m from the opposite edges of each plot, were checked before, during, and after the treatment period. There was no significant difference among catches before treatment, but during the treatment with attracticide, a high level of suppression of trap catch (95%) was evident. Less suppression was recorded in the caged droplet treatment (63%). After the removal of caged droplets, catches returned to control levels indicating that the insects had been present, but were not caught during the treatment period. In sharp contrast, removal of the exposed attracticide droplets resulted in only a gradual loss of suppression in the next four days, indicating that moths in these plots had been killed. There is potential for control of leafrollers by attracticide, but more work is needed on biological and technical constraints to the approach.

proceedings of the new zealand weed and pest control conference/new zealand plant protection/proceedings of the ... national weeds conference/proceedings of the new zealand weed control conference/proceedings of the new zealand plant protection conference

Lure and kill as a new control tactic for leafrollers