THE HLB Epidemic in California
HLB+ Trees
2,382
Total as of Jul 1, 2021.
Updated monthly.
CLas+ ACP
342
Total as of Jul 1, 2021.
Updated monthly.
Tree samples tested
431,284
Total as of Mar, 2021.
Updated quarterly.
ACP samples tested
427,943
Total as of Mar, 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+ trees by grid
CA CLas+ ACP detections by grid
Clas+ ACP finds by city map
HLB+ trees 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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Analytical Updates Blog
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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.
Tamarixia radiata releases by S
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Tamarixia radiata releases by C,N CA cou
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T. radiata nymph finds
Tamarixia radiata releases by S
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Numbers at a glance
