Eradication Efforts Underway After Fruit Fly Species Found in Contra Costa County

July 24, 2014 8:33 am · 1 comment

Efforts to eradicate an invasive fruit fly species are underway in Contra Costa County after the pests were found in flytraps in Eastern Contra Costa County, a county spokeswoman said.

County agricultural department crews discovered three male guava fruit flies in traps set to monitor for Oriental fruit flies from July 9 to July 11, according to county spokeswoman Betsy Burkhart. The California Department of Food and Agriculture, or CDFA, confirmed the identification of the pests and is leading the effort to eradicate them.

The eradication program is expected to take place this week within a 90-square-mile area, including a large portion of water and part of the Concord Naval Weapons Station, according to Burkhart.

The treatment will include spraying telephone poles with a mix of bait and insecticide at heights of 9 to 10 feet, out of reach of people and pets, the spokeswoman said.

The guava fruit fly is a pest that is not native to the U.S. and is normally found in India, Nepal, Pakistan, Sri Lanka and Thailand, according to the CDFA.

Area residents with questions about the fruit fly eradication program may contact the county’s agricultural department at (925) 646-5250 or the CDFA hotline at (800) 491-1899.

Wellgeez July 24, 2014 at 2:15 PM

More information on the Guava Fruit Fly Project can be found here:

And the point of contact to ensure they have proper permitting to add chemicals in the water is below (they need an NPDES permit):

Regional Water Board 2: Lila Tang (
San Francisco Bay Regional Water Quality Control Board
1515 Clay Street, Suite 1400
Oakland, CA 94612
Phone: (510) 622-2425

Also, here is a somewhat outdated fact sheet about the pesticide being used according to the site:

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