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Costco is warning prospects who just lately bought a sure number of plant that they might have unknowingly introduced residence an invasive insect able to spreading a illness that may harm and even kill another vegetation and timber.
The warehouse large issued a discover final week that desert willow vegetation offered between June 24 and July 3, 2026, could have been infested with the glassy-winged sharpshooter.
“This invasive insect pest can unfold dangerous plant ailments, together with Pierce’s illness, which may kill grapevines,” the discover mentioned. “The pest can even harm citrus timber, panorama vegetation and different crops. Early detection and speedy response are essential to stopping the pest from spreading additional.”
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Costco has issued a warning about desert willows, just like the one pictured above, that had been just lately offered at its warehouses. (iStock)
Pierce’s illness is a bacterial an infection that has lengthy threatened California vineyards.
In accordance with a 2025 report ready for the California Division of Meals and Agriculture, the illness prices the state’s grape and wine trade about $110 million yearly, and officers estimate these losses may climb by one other $56 million per yr if the invasive pest turns into established statewide.
A glassy-winged sharpshooter rests on a leaf at Buena Biosystems in Santa Paula on June 13, 2002. (Stephen Osman/Los Angeles Instances by way of Getty Photos)
Researchers say the glassy-winged sharpshooter is especially tough to comprise as a result of it could fly 1 / 4 mile or extra with out stopping, permitting it to unfold the illness between host vegetation.
Somewhat than returning the vegetation to a Costco warehouse, prospects are being instructed to maintain them of their authentic containers, isolate them from different vegetation and make contact with their native county agricultural commissioner’s workplace.
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Agricultural inspectors could study the plant and close by vegetation, and if the pest is discovered, officers will take away and get rid of the plant.
A buyer browses vegetable vegetation at a Costco Wholesale Corp. retailer in Naperville, Illinois, on Could 23, 2016. (Daniel Acker/Bloomberg by way of Getty Photos)
Costco additionally suggested prospects to not plant the desert willow in the event that they haven’t already carried out so, to not transport or relocate it, and to not throw it away or place it in a compost bin. If doable, the corporate recommends sealing the plant inside two trash luggage till inspectors can consider it.
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Though prospects are being advised to not convey the vegetation again to Costco, the retailer mentioned it is going to present a full refund to affected consumers who current the notification letter at their native warehouse.
The corporate apologized for the inconvenience, saying prospects’ cooperation is essential to serving to shield California agriculture from the unfold of the invasive pest.
