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:

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Geographic Distribution

Where is the disease being found?

CLas+ ACP by city
CLas+ ACP by city

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HLB+ trees by city barchart
HLB+ trees by city barchart

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HLB+ tree distribution
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
ACP finds by city map

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CA HLB detections by grid
CA HLB detections by grid

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CA CLas+ ACP 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
CLas+ ACP detected weekly

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HLB proportion positive
HLB proportion positive

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CLas+ ACP 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
HLB violin plot

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CLas+ ACP violin plot
CLas+ ACP violin plot

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Analytical Updates Blog

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Regulatory Program

Sample numbers plant SoCal
Sample numbers plant SoCal

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Sample numbers plant statewide
Sample numbers plant statewide

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ACP sample numbers SoCal
ACP sample numbers SoCal

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ACP sample numbers statewide
ACP sample numbers statewide

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biological control Program

Data courtesy Dr. David Morgan, USDA.

T. radiata nymph finds
T. radiata nymph finds

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Biocontrol releases- South
Biocontrol releases- South

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Biocontrol releases- North
Biocontrol releases- North

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Numbers at a glance

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Regional ACP Quarantine zones for the shipment of bulk citrus.
Yellow sticky traps with ACP detected on grove traps within 5 miles of a major transportation route before and after trucks of fruit were requried to be tarped during transit.