San Diego County Warns Consumers About Invasive Pests in Costco Desert Willow Plants

San Diego, CA, July 23, 2026 —

San Diego County agricultural officials have issued a warning to consumers who purchased Desert Willow plants from Costco between June 24 and July 3. The alert is due to the potential presence of invasive pests, identified as the Broad-headed Sharpshooter and the Glassy-winged Sharpshooter.

These specific pests are a concern because they are known carriers of Pierce’s disease. This disease poses a significant threat to the grape industry, potentially causing widespread damage to vineyards.

The affected Desert Willow plants were distributed to Costco locations throughout California. Within San Diego County, seven stores received shipments of these plants. Officials are advising residents who purchased the plants during the specified timeframe on how to proceed.

Consumers are instructed to handle the plants with care to prevent any potential spread of the pests. Further guidance on reporting sightings or seeking assistance is available through the county’s agricultural services department. The specific method for contacting the county for assistance was not provided.

The timeline for the sale of these plants at Costco locations across California, including the seven in San Diego County, was between June 24 and July 3. The warning focuses on identifying and managing the potential presence of the Broad-headed Sharpshooter and the Glassy-winged Sharpshooter to mitigate the risk of Pierce’s disease transmission.

Story summarized from the original created by City News Service on www.nbcsandiego.com, see more information here.

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