
New Citrus Quarantine: Why It Matters to San Diego Residents
In a significant move to protect agriculture, the California Department of Food and Agriculture has declared a new citrus quarantine in northern San Diego County. This announcement, made on September 9, 2025, follows the discovery of Huanglongbing (HLB), a deadly bacterial disease also known as citrus greening, in a San Clemente citrus tree.
Impact on Local Agriculture and the Economy
This newly established quarantine area spans from southern Orange County to northern San Diego County and includes portions of Marine Corps Base Camp Pendleton. The implications for local agriculture are serious; San Diego County’s citrus industry generates approximately $144 million annually. If not contained, HLB could lead to devastating consequences, including the eventual death of infected trees and substantial economic losses.
Community Involvement and Compliance
The quarantine aims to prevent the spread of HLB by restricting the movement of citrus plants and products out of the affected areas. San Diego Agricultural Commissioner Ha Dang emphasizes the importance of community cooperation in these efforts. Residents are urged to refrain from moving citrus plants, leaves, or foliage into or out of the quarantine area. Proactive measures, including properties’ testing and treatment, will be undertaken to stop the disease's spread.
Symptoms and Recognition of the Disease
HLB presents several visible symptoms. Infected trees may show mottled yellow leaves and produce small, asymmetrical fruit that is partially green and tastes bitter. Recognizing these signs early is essential for residents to take appropriate action against this disease.
As state officials align efforts with local growers and nurseries, it is crucial for residents to understand the significance of compliance with quarantine measures. The move not only safeguards local crops but ensures food security in the region.
Call to Action for Residents
To protect our citrus trees and agricultural heritage, it's vital for San Diego community members to stay informed and vigilant against HLB. Participate in local efforts by monitoring your citrus trees and promptly reporting any signs of the disease.
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