1a. Objectives (from AD-416):
Optimize pheromone-based mating disruption and control of the citrus leafminer; develop new semiochemical-based methods for Diaprepes root weevil and for the Asian Citrus Psyllid (ACP).
1b. Approach (from AD-416):
ARS has developed new methods for field application of SPLAT™ products and has discovered and/or optimized pheromone blends for insect control. Cooperator will synthesize and formulate semiochemicals and provide experimental formulations for testing by ARS in Florida and elsewhere.
3. Progress Report:
This project is related to Objective 1: Develop semiochemical-based control methods for citrus pests, particularly Asian citrus psyllid (ACP). Field trials were concluded during 2011 and new field trials were established in 2012 to test hypotheses related to the effect of intentional coverage gaps and pheromone formulation on efficacy and longevity of pheromone-mediated mating disruption of citrus leafminer (CLM) following applications of SPLAT CLM™ to citrus groves at locations in Florida. In addition, validation trials were established at locations in St. Lucie, Charlotte, DeSoto and Okeechobee counties to document the performance of SPLAT CLM purchased by growers and applied under varying field conditions. At a location in St. Lucie county, we established two replicated field trials. The first will test the efficacy of intentional coverage gaps (skipped rows); the second compares the 'natural' 3:1 triene:diene pheromone blend to the off ratio blend containing the triene pheromone compound only for longevity and activity across a treatment gap. We have progressed significantly towards our goal of providing the citrus industry with the first use of insect semiochemicals as a control measure for a major pest in commercial citrus and a means of mechanical application to large areas. Continued effort will focus on extending the longevity of individual applications of SPLAT-CLM and reducing costs.