Flight-Response of Spotted Wing Drosophila to Olfactory Cues from Conspecific Infested and Grey Mold-Infected Grape Berries
2012 Annual Report
1a.Objectives (from AD-416):
Develop an attract & kill tool for controlling and/or monitoring populations of Spotted Wing Drosophila (SWD) in and around table grape production areas.
1b.Approach (from AD-416):
We will estimate the relative attractiveness of SWD-infested berries, grey-mold infected berries, and high-quality berries by quantifying the flight response of SWD to volatile chemical cues in a flight tunnel bioassay. Subsequently, flight response data will be used as a diagnostic endpoint to isolate and identify key chemical attractants released from berries.
This Assistance Type Cooperative Agreement was established to support objective 1 of the in-house project and is related to the development of crop production strategies that ultimately reduce reliance on postharvest fumigation with methyl bromide. The goal of this project is to develop an attract & kill tool for controlling and/or monitoring populations of spotted wing drosophila (SWD) in areas of table grape production. The University of California cooperator conducted experiments to quantify the flight response of female and male SWD to conspecific-infested berries, gray-mold infected berries, and high-quality berries. Results show the following order of attractiveness: gray mold infected berries > conspecific infested berries >>> high-quality berries. ARS scientists plan to use the flight response of SWD as an identification tool to isolate key chemical attractants released from infected berries and then utilize them in vineyard-deployed traps.