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United States Department of Agriculture

Agricultural Research Service

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Research Project: Evaluation of a Three-lure (Trimedlure, Methyl Eugenol and Raspberry Ketone) Detection Trap Against Mediterranean Fruit Fly, Oriental Fruit

Location: Tropical Crop and Commodity Protection Research

2013 Annual Report


1a.Objectives (from AD-416):
1. Test the performance of TML, C-L/RK and ME detection traps with a novel Farma Tech solid 3-lure and insecticide (TMR-Mallet) formulation under Hawaii conditions (Kauai Coffee). 2. Test the performance of TML, C-L/RK and ME detection traps with a novel Farma Tech solid 3-lure and insecticide (TMR-Mallet) formulation under California climatic conditions against “TML, ME and C-L/RK responding” fruit flies. 3. Conduct chemical analyses of FarmaTech wafers weathered in California.


1b.Approach (from AD-416):
1. In Hawaii captures of Medfly, oriental and melon fruit flies will be determined in traps placed in Kauai Coffee orchards in Hawaii where Medfly, oriental fruit fly and melon fly are abundant in the same locality. 2. After further confirmatory data is obtained weathering trials will be done in California. Bioassays will be done in Hawaii. 3. Experimental design will consist of 4 replications of each of the treatments (4 weathered and 4 fresh wafers) tested in a completely randomized block design (Vargas et al. 2005). 4. By comparing mean number of flies captured inside traps on successive weeks, the relative ‘attraction” of dispensers will be determined at prescribed intervals. TML, ME and C-L trap capture data for Medfly, oriental fruit fly and melon fly (mean number flies/trap/wk) will be subjected to analysis of variance (Proc GLM), and means separated with a Least Significant Difference (LSD) test at the P = 0.05 level by week. 5. Samples for lure and pesticide decay will be sent to FarmaTech International (North Bend, WA) for chemical analysis using GLC analysis. Rates of lure and pesticide decay of the TMR stations will be determined and modeled.


3.Progress Report:

The goal of this Trust Agreement is to improve current trapping methods for invasive fruit flies that continue to threaten agriculture world-wide which contributes to objective 6 of the in-house project, "Develop area-wide IPM systems including integration of environmentally friendly replacements for organophosphate chemicals to reduce the economic impact of fruit flies and other tropical plant pests".

New outbreaks of invasive fruit flies (Diptera: Tephritidae) continue to threaten agriculture world-wide. Establishment of these pests often results in serious economic and environmental consequences associated with quarantine, control, and eradication programs. Early fruit fly detection and eradication in the United States requires deployment of large numbers of traps baited with the highly attractive male specific parapheromone lures trimedlure (TML), cue-lure (C-L)/Raspberry Ketone (RK), and methyl eugenol (ME) to detect such pests as Mediterranean fruit fly, melon fly, and oriental fruit fly, respectively. Currently California deploys 30,000 of these traps for fruit fly detection.

In survey trials near Kona, Hawaii, captures of Medfly, oriental fruit fly, and melon fly with Mallet TMR wafers were equal to those for the standard TML, ME, and C-L traps used in Florida and California (Objective 1). TMR is a three-Lure (TML, ME, RK = TMR) detection trap against Medfly, Oriental Fruit Fly and Melon Fly. With confirmatory trials completed in Kona, further testing is being conducted in citrus under California weather conditions (Objective 2). Through a scientist at the University of California, Riverside, we have conducted weathering trials of the novel TMR dispensers in California (Riverside, Lindcove, Bakersfield, Ventura, and Costa Mesa) beginning in July of 2012. Climate data is being obtained from Hobo weather recorders maintained at each location. Weathered dispensers are being sent to Hawaii and Washington for bioassays and chemical analyses, respectively. Pacific Basin Agricultural Research Center (PBARC) scientists will oversee bioassays in Hawaii. A scientist at Farmatech (FT) and at Washington State University are collaborating on chemical analysis of wafers in North Bend, Washington. Data from the July-August 2012 trial is complete and is currently being statistically analyzed. Data for the January-March Trial is still being collected.

From a worker safety, convenience, and economic standpoint, Farma Tech TMR Mallet solid wafers with Dichlorvos (DDVP) may be more cost effective, convenient, and safer to handle than current liquid lure and insecticide formulations (e.g. naled) used for detection programs for TML, ME and C-L responding flies in California. Cost/benefit analyses of Mallet TMR vs. standard trapping systems will be done. We will submit data obtained in these studies to action agencies to improve current trapping methods. Other countries such as New Zealand have begun investigating the FT Trilure dispensers based on our results.


Last Modified: 7/23/2014
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