THE HLB Epidemic in California
HLB+ Trees
3,175
Total as of Apr 4, 2022.
Updated monthly.
CLas+ ACP
398
Total as of Apr 4, 2022.
Updated monthly.
Tree samples tested
539,531
Total as of Apr 2022.
Updated quarterly.
ACP samples tested
513,063
Total as of Apr 2022.
Updated quarterly.
Data collection and analysis supported by:
Geographic Distribution
Where is the disease being found?
CLas+ ACP by city
HLB+ trees by city barchart
HLB+ tree distribution
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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.
ACP finds by city map
CA HLB detections by grid
CA CLas+ ACP detections by grid
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TEMPORAL dISTRIBUTION
What patterns are emerging over time?
CLas+ ACP detected weekly
HLB proportion positive
CLas+ ACP proportion positive
The proportion of all ACP samples that tested positive for CLas each year.
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Bacterial Titer
Is the concentration of bacteria in infected samples changing?
HLB violin plot
CLas+ ACP violin plot
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Click the images below to view larger, or hover and use the right and left arrows to view more.
Regulatory Program
Sample numbers plant SoCal
Sample numbers plant statewide
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ACP sample numbers SoCal
ACP sample numbers statewide
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biological control Program
Data courtesy Dr. David Morgan, USDA.
T. radiata nymph finds
Biocontrol releases- South
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Biocontrol releases- North
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Numbers at a glance
