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United States Department of Agriculture

Agricultural Research Service

Research Project: Postharvest Treatment of California Raspberries to Eliminate the Spotted Wing Drosophila

Location: Commodity Protection and Quality

Project Number: 5302-43000-037-34
Project Type: Reimbursable

Start Date: Oct 01, 2013
End Date: Jul 31, 2015

Objective:
Conduct research that proves postharvest treatments can be used to control spotted wing drosophila in the trade and marketing channels of California raspberries.

Approach:
Utilize a cooperative effort between USDA-ARS, USDA-APHIS, California industry, and foreign counterparts to adress pest-related barriers to export. Particular attention will be paid to the expansion and retention of export markets. This project is planned in phases as indicated below. Each phase will have its own goals and these goals will feed those of the following phase. Phase I: Establish a colony of spotted wing drosophila (SWD) at USDA-ARS-SJVASC in Parlier, CA with the throughput necessary to routinely conduct fumigation studies on infested raspberries. Phase II: Conduct exploratory fumigations with methyl bromide and phosphine to establish the most tolerant life-stage of spotted wing drosophila. Phase III: Under fumigation conditions optimized to control spotted wing drosophila, conduct confirmatory fumigations at 64 F as well as 55 F for methyl bromide and 34 F for phosphine and its mixtures. Document results of trials including Munro methods for CT measurement. Phase IV: Repeat confirmatory studies to achieve phytosanitary requirements of the export market (e.g., >30,000 treated, Probit-8.2 efficacy at 95% level of confidence). Phase V: Document phytotoxicity and residues that occur from dosages required for controlling the most fumigant-tolerant life stage of spotted wing drosophila.

Last Modified: 7/23/2014
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