THE HLB Epidemic in California
HLB+ Trees
3,785
Total as of Sep 2022.
CLas+ ACP
472
Total as of Sep 2022.
Tree samples tested
568,838
Total as of Sep 2022.
Updated quarterly.
ACP samples tested
531,073
Total as of Sep 2022.
Updated quarterly.
Data collection and analysis supported by:
Click the images below to view larger, or hover and use the right and left arrows to view more.
Figures show latest available data, through March 2022.
Geographic Distribution
Where is the disease being found?
HLB+ trees by city
CLas+ ACP by city
HLB+ trees by city
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All HLB+ trees have been found in residential areas. No diseased trees have been detected with PCR in a commercial grove.
CA HLB detections by grid
CA CLas+ ACP detections by grid
CA HLB detections by grid
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TEMPORAL dISTRIBUTION
What patterns are emerging over time?
HLB proportion positive
ACP CLas+ proportion positive
CLas+ ACP samples detected weekly
HLB proportion positive
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Bacterial Titer
Is the concentration of bacteria in infected samples changing?
HLB+ violin plot
CLas+ ACP violin plot
HLB+ violin plot
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Analytical Updates Blog
Regulatory Program
Plant sample numbers SoCal
Plant sample numbers statewide
Plant sample numbers SoCal
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ACP sample numbers SoCal
ACP sample numbers statewide
ACP sample numbers SoCal
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biological control Program
Data courtesy Dr. David Morgan, USDA.
Biocontrol releases- South
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Biocontrol releases- North
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T. radiata nymph finds
Biocontrol releases- South
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Numbers at a glance
