Official Pest Report

Official Pest Reports are provided by National Plant Protection Organizations within the NAPPO region. These Pest Reports are intended to comply with the International Plant Protection Convention's Standard on Pest Reporting, endorsed by the Interim Commission on Phytosanitary Measures in March 2002.

Bactrocera dorsalis (Oriental Fruit Fly): APHIS Removes the Quarantine in  Fountain Valley, Orange County, California

Country: United States


Bactrocera dorsalis (Oriental Fruit Fly): APHIS Removes the Quarantine in  Fountain Valley, Orange County, California

Richard Johnson, Fruit Fly National Policy Manager, at (301) 851-2109 or


On August 19, 2023, the USDA’s Animal and Plant Health Inspection Service (APHIS) and the California Department of Food and Agriculture (CDFA) removed the Oriental fruit fly (OFF) quarantine in Fountain Valley, Orange County, California, after three generations elapsed with no additional detections in this area. This action releases the 100 square miles of the Fountain Valley quarantine, which contained no commercial agriculture.

On September 16, 2022, APHIS and CDFA established an OFF quarantine in Fountain Valley, Orange County, following the confirmed detection by CDFA of six adult male and two unmated adult female OFF from various sites in the Fountain Valley area. There were subsequent detections of OFF larvae and adults between September 21, 2022, and January 4, 2023. The quarantine release date was based on a degree-day model from the date of the last detection. APHIS restricted the interstate movement of regulated articles from this area to prevent the spread of OFF to non-infested areas of the United States. APHIS has worked cooperatively with CDFA to eradicate this transient OFF population through various control actions per program protocols.

A description of all current federal fruit fly quarantine areas is found at:

Under IPPC standards, Bactrocera dorsalis  is a transient pest under eradication that is present only in four areas in California. This species is not widely distributed and is under official control in the United States.

Posted Date: Sept. 29, 2023, 4:05 p.m.