THE HLB Epidemic in California
HLB+ Trees
2,619
Total as of Nov 5, 2021.
Updated monthly.
CLas+ ACP
368
Total as of Nov 5, 2021.
Updated monthly.
Tree samples tested
507,547
Total as of Sep, 2021.
Updated quarterly.
ACP samples tested
499,151
Total as of Sep, 2021.
Updated quarterly.
Data collection and analysis supported by:
Geographic Distribution
Where is the disease being found?
HLB+ trees by city barchart
HLB+ tree distribution
CLas+ ACP by city
HLB+ trees by city barchart
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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.
HLB+ tree detections by grid
CLas+ ACP detections by grid
ACP finds by city map
HLB+ tree detections by grid
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TEMPORAL dISTRIBUTION
What patterns are emerging over time?
HLB proportion positive
CLas+ ACP proportion positive
The proportion of all ACP samples that tested positive for CLas each year.
CLas+ ACP 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
Bacterial titer of CLas+ ACP samples
HLB 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
Sample numbers plant 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
