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Mating disruption and attract-and-kill (A&K) gels were evaluated for control of grape root borer (GRB), Vitacea polistiformis Harris (Lepidoptera:Sessidae), in Florida grape (Vitis sp.) vineyards. For mating disruption, pheromone twist-ties with leopard moth, Zeuzera pyrina L. (Lepidoptera: Cossidae), pheromone were placed in vines at a rate of 635 per ha. Attract-and-kill (A&K) gels containing the GRB pheromone and a pyrethrin (botanical insecticide) were applied to vine trunks at a rate of 112.5 g per hectare. These treatments were compared with chlorpyrifos (Lorsban), an organophosphate insecticide, and an untreated control in a randomized complete block design. Two wing-style sticky traps with GRB pheromone were placed in each treatment to monitor male moth activity and determine levels of trap shutdown. Complete trap shutdown occurred in the twist-tie sections for both 2003 and 2004 suggesting disruption of mating. Traps placed in the A&K and the pheromone twist-tie sections caught significantly fewer GRB than the Lorsban treatments in 2003. In 2004, significantly fewer moths were caught in the pheromone twist-tie and Lorsban treatments than the A&K and untreated controls. The differences between 2003 and 2004 for A&K treatments were due to the use of the incorrect pheromone blend in the 2004 batch of A&K. Whereas the differences in Lorsban treatments between both years may be related to residual activity of the pesticide. The economics of adopting A&K and mating disruption with twist-ties containing leopard moth pheromone is discussed. Both A&K and mating disruption with the leopard moth pheromone show promise as reduced-risk control tactics to be used in a GRB integrated pest management program and warrant further study.

the florida entomologist

MATING DISRUPTION AND ATTRACT-AND-KILL AS REDUCED-RISK STRATEGIES FOR CONTROL OF GRAPE ROOT BORER VITACEA POLISTIFORMIS (LEPIDOPTERA: SESIIDAE) IN FLORIDA VINEYARDS