Several species of parasitoids were introduced to control fruit flies between 1937 and 1967, but only Psyttalia fletcheri , a melon fly parasitoid, became established. Quarantine surveillance against fruit flies on Guam is funded by the Territory government and conducted by the Department of Agriculture. An interesting melon fly control system is used by some farmers in Guam, consisting of yellow sticky traps and yeast baits. Government staff claim that it reduces levels of infestation on cucurbit crops. It was eradicated from Guam and CNMI by an intensive male annihilation, protein bait spraying and sterile insect technique campaign that lasted between 1962 and 1965.
Melon fly causes considerable losses on cucurbit crops, though no specific data are available.
There are 20 trapping sites, each with a Cue-lure and a methyl eugenol trap. Fruit fly posters have been set up at the airport and a quarantine awareness programme is run in schools. Boyle, K. 1993. A benefit-cost analysis. United States Department of Agriculture - Soil Conservation Service.