Fruit Fly Quarantines Lifted in Contra Costa & Los Angeles Counties

California Citrus Pest & Disease Prevention Program — The California Department of Food and Agriculture (CDFA) has officially declared an end to the Tau fruit fly quarantine in Los Angeles County, and an end to the Oriental fruit fly quarantine in Contra Costa County following the successful eradication of the invasive pests.

Tau Fruit Fly Quarantine

The Tau fruit fly quarantine, which was established in the Santa Clarita area of Los Angeles County, was the first-ever quarantine for the Tau fruit fly in the Western Hemisphere. It encompassed the city of Santa Clarita and surrounding areas in parts of Stevenson Ranch, Newhall, Castaic Junction, Oat Mountain and Del Valle.

Thanks to the diligent efforts of Santa Clarita area residents, local agricultural officials, the Los Angeles County Department of Agricultural Commissioner/Weights and Measures, and officials from CDFA and the United States Department of Agriculture, the invasive pest has been successfully eradicated from the area as of June 28.

“Following one of the largest statewide invasive fruit fly populations we’ve seen in a number of years in California, we’re incredibly proud that we’ve been able to successfully achieve eradication of the Tau fruit fly,” said Victoria Hornbaker, director of CDFA’s Plant Health and Pest Prevention Services Division. “The lifting of this quarantine proves that our efforts are working, and the responsiveness and cooperation of residents across California and our partners is critical to that success.”

During the quarantine, crops that are hosts for the fruit fly — which include more than 300 varieties, such as citrus and other fruits, nuts, vegetables and berries — were not allowed to be moved from the properties where they were grown. Commercial crops were required to meet stringent treatment or processing standards before being harvested or moved.

Oriental Fruit Fly Quarantine

The announcement comes 10 months after officials first detected populations of the Oriental fruit fly in the area. This destructive pest has been eliminated through the cooperation and diligence of Contra Costa County residents and local agricultural officials, the California Department of Food and Agriculture (CDFA), working in coordination with the United States Department of Agriculture (USDA) and the Contra Costa County Agricultural Commissioner.

“We’re pleased to report this is the third Oriental fruit fly quarantine lifted in California this year,” said Victoria Hornbaker, director of CDFA’s Plant Health and Pest Prevention Services Division. “These recent successes prove that through the cooperation of residents across the state and our partners, eradication of invasive species is possible.”

While several fruit fly quarantines have now been lifted in California, additional quarantines remain and still threaten the state’s natural environment, agriculture and economy. To review all active quarantine maps, please visit CAFruitFly.com.

When at home, residents are encouraged to stay vigilant for signs of invasive pests. To help prevent any future introductions of invasive species, residents should follow these guidelines:

• Cooperate with agricultural officials and allow them access to your garden to place traps, inspect plants, conduct necessary treatments or remove potentially infested produce.
• Determine if your property is located within an active quarantine area by visiting CAFruitFly.com.
• Buy fruit trees and vegetable plants from licensed California nurseries. Purchasing agricultural goods from uncertified sources can spread invasive pests. Source your plants locally and responsibly. To find a licensed nursery near you, visit CDFA’s Directory of Licensed Nurseries.
• Inspect your garden for signs of invasive fruit flies or maggots and report any findings to CDFA at 1-800-491-1899 or your local county agricultural commissioner’s office.
• When entering the United States from another country, avoid bringing agricultural products — including fruits or vegetables. Help us protect our agricultural and natural resources and California’s unique biodiversity from invasive fruit flies — please Don’t Pack a Pest (dontpackapest.com) when traveling or mailing/receiving packages.

To learn more about invasive species and how to protect the county’s fruits and vegetables, visit CAFruitFly.com or contracosta.ca.gov.