APHIS Removes Oriental Fruit Fly (Bactrocera dorsalis) Quarantine Area in California

FOR INFORMATION AND ACTION 
DA-2026-14 
April 10, 2026 

Subject: APHIS Removes Oriental Fruit Fly (Bactrocera dorsalis) Quarantine Area in California
 
To: State, Tribal, and Territory Agricultural Regulatory Officials 

On March 23, 2026, the Animal and Plant Health Inspection Service (APHIS) and the California Department of Food and Agriculture (CDFA) removed the Oriental fruit fly (Bactrocera dorsalis; OFF) quarantine in Riverside and San Bernardino Counties, California, designated the Jurupa Valley quarantine. This action released 131 square miles from quarantine, including 10 acres of commercial grape production. Release from quarantine occurred after three generations had elapsed since the date of the last OFF detection, based on a degree-day model. 

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 worked cooperatively with CDFA and the Riverside and San Bernardino County Agricultural Commissioners to eradicate this transient OFF population through various control actions per program protocols. 

The APHIS Exotic Fruit Flies website contains a description of all current Federal fruit fly quarantine areas. APHIS will publish a notice of this change in the Federal Register. 

For additional information you may contact: 

Catherine Marzolf 
National Policy Manager 
386-666-9932 
catherine.a.marzolf@usda.gov

Glorimar Marrero 
Assistant National Policy Manager 
240-577-4633 
glorimar.marrero@usda.gov

/s/

Matthew A. Rhoads 
Deputy Administrator 
Plant Protection and Quarantine