A highly contagious plant disease is threatening Texas’ citrus industry, prompting swift action from federal and state agriculture officials to contain its spread.
APHIS Expands Quarantine to Protect Texas Citrus
The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS), working with the Texas Department of Agriculture (TDA), has expanded citrus canker quarantines across parts of Cameron and Hidalgo Counties.
This urgent action, announced in June 2025, follows the detection of citrus canker in residential properties within the Lower Rio Grande Valley (LRGV).
Citrus canker, caused by Xanthomonas citri bacteria, poses a serious threat to Texas’ $300 million citrus industry, which is concentrated in the LRGV.
What is Citrus Canker?
Citrus canker is a bacterial disease affecting grapefruit, oranges, and other citrus crops. It spreads quickly in warm, humid environments through wind-driven rain, contaminated tools, and human activity.
Common symptoms include:
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Raised, water-soaked lesions on leaves, stems, and fruit
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Yellow halos surrounding affected areas
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Premature fruit drop and leaf loss
While citrus canker is harmless to humans, it renders fruit unmarketable due to visible blemishes and quality degradation.
New and Expanded Quarantine Zones
To contain the outbreak, APHIS has established a new quarantine zone in the Harlingen area of Cameron County. Existing quarantines in Rancho Viejo, Los Fresnos, Pharr, and Hidalgo have also been expanded.
The state has implemented parallel intrastate quarantines through the Texas Department of Agriculture. These measures prohibit the interstate movement of citrus plants, plant parts, and certain nursery stock, except under strict federal guidelines.
Economic Significance and Industry Risks
Texas’ citrus sector, centered in the LRGV, produces the majority of the state’s grapefruit and sweet oranges. The grapefruit industry is particularly vulnerable to citrus canker, with severe infections making fruit unmarketable.
Uncontrolled outbreaks can devastate local agriculture, as seen in Florida, where the citrus industry has spent over $1.3 billion combating the disease with limited success.
Impact of Citrus Canker on Texas Citrus Industry
| Aspect | Details |
|---|---|
| Disease Agent | Xanthomonas citri subsp. citri |
| Annual Industry Value | $300+ million (Rio Grande Valley region) |
| Main Crops Affected | Grapefruit (70%), Sweet Orange (30%) |
| Current Quarantine Areas | Cameron, Hidalgo, Brazoria, Harris, Fort Bend, Galveston counties |
| Regulatory Actions | Movement restrictions, tree removal, public education |
| Human Health Impact | No harm to humans, but fruit quality declines |
What This Means for Growers and Residents
The expanded quarantines affect both commercial growers and homeowners. Inspectors may remove infected residential citrus trees to prevent the disease from spreading to commercial groves.
Compliance with movement restrictions is essential. Transporting citrus plants, cuttings, or fruit from quarantined areas without meeting federal guidelines is prohibited and can result in penalties.
Community Efforts and Long-Term Outlook
Public awareness and cooperation are critical to managing the outbreak. Homeowners in affected counties should:
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Monitor citrus trees for symptoms
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Report suspected cases to agricultural authorities
There is no cure for citrus canker. Current strategies focus on early detection, containment, and research into disease-resistant citrus varieties. The citrus industry has already faced significant challenges from hurricanes and severe winter storms. This outbreak adds further pressure to safeguard crops and livelihoods.
Protecting Texas Citrus for the Future
The expansion of citrus canker quarantines underscores the importance of vigilance and cooperation among growers, residents, and agricultural agencies. Early detection and strict adherence to regulations are the best tools to protect Texas’ citrus industry from further harm.
For more information on affected areas and best practices, visit the APHIS Citrus Canker resource page.
Sources: US Department of the Agriculture.
Prepared by Ivan Alexander Golden, Founder of THX News™, an independent news organization delivering timely insights from global official sources. Combines AI-analyzed research with human-edited accuracy and context.
