Citrus Greening Awareness
Warnings about a devastating citrus plant disease are targeted at consumers, educators, homeowners, gardeners as well as growers in Texas.
This disease is called the Citrus Greening Disease (CG), or Huanglongbing, caused by the bacterium Candidatus Liberibacter asiaticus, which is vectored by the Asian Citrus Psyllid (ACP) insect.
Since 2005, CG has surfaced in multiple places in the U.S. It was first found in Florida, where the disease has since impacted the citrus industry. An infected plant and infected psyllids were found in Louisiana in 2008. Since then, this disease has been discovered in Georgia and South Carolina.
Fortunately, this disease pathogen has NOT been found in Texas. The insect vector is in south Texas, but no infected psyllids (to date) has been detected. On January 13, 2012 – USDA and TDA released information that Citrus Greening was found and confirmed in Hidalgo county. In spring of 2014, Hidalgo and Cameron counties were placed under CG quarantine. In July 2014, Harris county was placed under Citrus Greening quarantine. As of 10/9/2014 – Fort Bend and Montgomery counties are also included in the CG quarantine. The Harris, Fort Bend & Montgomery counties quarantine is known as the Gulf Coast Quarantine.
In order to prevent citrus greening from getting a foothold in the state, residents should be aware of what to look for, who to contact for assistance, and to report potential finds. AgriLife Extension offers seminars, training programs and resources to assist Texas residents in identifying potential cases.
WHY look for signs of citrus greening?
- There is currently no cure for an infected tree, so prevention is essential.
- Early detection and action help to limit spread of disease.
- Areas where citrus is grown must be protected from this devastating disease.
RESOURCES developed by the Texas Plant Disease Diagnostic Laboratory in cooperation with various colleagues and entities are listed below and available to the general public.
Awareness Information factsheet (*added 2014/10/09)
The purpose of this factsheet is for distribution primarily by retail nurseries to their customers to disseminate information regarding the Gulf Coast Citrus quarantine. Rudimentary and basic disease and symptom description is provided along with the notice that quarantined plants CANNOT be moved out of the quarantined counties and any movement of citrus plant material may be subject to Texas Department of Agriculture regulations.
There are several citrus disease related fact sheets available at the Texas A&M AgriLife Bookstore*:
* Call AgriLife Copy Services (979-845-2856) for bulk orders of any of the above products.
Citrus Greening Coloring and Activity Book
Asian Citrus Psyllid treatment poster*
* poster is primarily directed to citrus producers and contain current insecticide recommendations for suppression of Asian Citrus Psyllid.
Citrus Health Response video series (Youtube videos – AgriLifeVideo):
Citrus Disease Guide
If you find or have suspected citrus with Citrus Greening symptoms or the Asian Citrus Psyllid, please contact the:
Texas Department of Agriculture
or your local AgriLife Extension county office for assistance
You may also contact us for additional guidance on sampling and confirmatory analysis.
Texas Plant Disease Diagnostic Laboratory
1500 Research Parkway, Suite A130, College Station, TX 77845
Phone: (979) 845-8032, Fax: (979) 845-6499