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Posted on: June 16, 2021

Save Our Citrus! Help Fight HLB Tree Disease

Save Our Citrus Join the Fight Against HLB

A deadly disease for plants threatens our citrus trees. Please help join the fight against the citrus tree disease, Huanglongbing (HLB). HLB spreads easily and once it infects a citrus tree, the tree must be removed to prevent further spread of the disease. To continue to protect our state’s $3.4 billion citrus industry and your local citrus trees, there are a some regulations that apply to our immediate area. 

As of today, HLB has only been found in parts of Los Angeles, Orange, Riverside and San Bernardino counties. Although HLB has not yet been found in a commercial citrus grove, more than 2,300 residential citrus trees in California have been infected with HLB and removed to limit the spread of HLB. An HLB quarantine is currently in place in parts of Los Angeles, Orange, Riverside and San Bernardino counties, which limits the movement of citrus plants and material to prevent the spread of HLB. At this time, residents in our area may not:

  • Move citrus plant material out of HLB quarantine boundaries. Host material includes all plant parts, including stems and leaves.
  • Purchase a citrus tree not grown in approved ACP-resistant structures. Retailers and nurseries without ACP-resistant structures within the HLB quarantine zone are prohibited from selling citrus in these areas. 

If fruit is free of stems and leaves and washed thoroughly, residents may share their backyard harvest inside of the HLB quarantine zone in small quantities – but different rules apply to commercial growers. 

You may see officials from the California Department of Food & Agriculture (CDFA) out in your neighborhood surveying for HLB, collecting plant samples, and more. Please note that officials may take samples of plant material from your trees for further review and may leave a notice at your door to conduct future surveying work. Officials will have a badge indicating their affiliation with CDFA and/or a uniform shirt or patch clearly identifying their affiliation with CDFA or State Agriculture.

Please see this fact sheet (PDF) to learn more. If you have citrus on your property, you should inspect your trees regularly and immediately report any suspected ACP presence or HLB symptoms to the free CDFA pest hotline at 800-491-1899. To learn more about the pest and disease and how you can help in the fight to save California citrus, visit

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