Fruit-fly quarantine will cover large portion of Santa Clara County through mid-2024

Fruit-fly quarantine will cover large portion of Santa Clara County through mid-2024

SANTA CLARA COUNTY — The detection of eight oriental fruit flies in Santa Clara County has prompted officials to declare a quarantine of homegrown fruits and vegetables in portions of the area through mid-2024.

The oriental fruit flies, an invasive pest native to Asia, are known to burrow themselves into hundreds of fruits, rendering them inedible, according to a news release from the county. Among the fruits most susceptible to the pest are key California crops like avocados, apples, citrus fruits, tomatoes and peppers.

“It would be disastrous for the oriental fruit fly to get established in Santa Clara County and California,” county Agricultural Commissioner Joe Deviney said in the statement. “We all need to be vigilant in protecting our agricultural and natural resources. Please do not bring or ship any fruits, vegetables or plants into California without ensuring they are permitted by law.”

In efforts to prevent the spread of the flies, the quarantine covers a 112-square-mile area that includes the entirety of Santa Clara and portions of Cupertino, Milpitas, San Jose and Sunnyvale.

Under the quarantine, which is expected to last until June 1, 2024, residents within the limits are required to keep homegrown fruit at their residence. The crops can still be eaten or processed, but if they’re disposed of, the crops must be double-bagged and sealed.

Some businesses, including farms, plant nurseries, farmers markets and fruit vendors, will be affected by the quarantine. The county said it will work with businesses to establish compliance agreements to ensure that infested materials do not leave quarantine areas.

“They’ve reached out to us and they’ve told us we’re going to be encompassed in (several markets),” said Jerry Lami, the executive director of the West Coast Farmers Market Association, which operates 11 farmers markets across the Bay Area.

Lami said many fruits and vegetables will need to be covered with cloth or plastic wrap, which would prevent insects from landing on them and laying eggs. Vendors will be required to bring less crops to markets, as leftovers won’t be allowed back on farm property after being exposed at market.

He added that the county is still trying to determine which fruits and vegetables the flies might be targeting.

A quarantine of a similar scale was imposed in 2021 when oriental fruit flies were discovered in the Santa Clara Valley. The quarantine mostly focused on the southern part of San Jose.

During the quarantine, the California Department of Food and Agriculture will place bait on trees, poles and other surfaces near the area the flies were found. The bait contains an organic pesticide, spinosad, which kills the flies. According to the county, this method is safe for people and pets.

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The announcement comes less than two weeks after the county said it would spray for oriental fruit flies after finding only two of the insects in the region.

Two women were recently charged with the illegal importation of fruit after they allegedly organized the transportation of the tropical fruit langsat from Vietnam in 2022. Portions of the fruit were found to have the larvae of an invasive species of fruit fly native to South Asia.

Officials on Wednesday did not offer any link between the oriental fruit fly infestation and the illegal fruit-import charges.