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+ trees by city barchart

HLB+ tree distribution
HLB+ tree distribution

CLas+ ACP by city
CLas+ ACP by city

HLB+ trees by city barchart
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
HLB+ trees by grid

CA CLas+ ACP detections by grid
CA CLas+ ACP detections by grid

Clas+ ACP finds by city map
Clas+ ACP finds by city map

HLB+ trees by grid
HLB+ trees by grid

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TEMPORAL dISTRIBUTION

What patterns are emerging over time?

HLB proportion positive
HLB proportion positive

CLas+ ACP proportion positive
CLas+ ACP proportion positive

The proportion of all ACP samples that tested positive for CLas each year.

CLas+ ACP weekly
CLas+ ACP weekly

HLB proportion positive
HLB proportion positive

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Bacterial Titer

Is the concentration of bacteria in infected samples changing?

HLB violin plot
HLB violin plot

CLas+ ACP violin plot
CLas+ ACP violin plot

Bacterial titer of CLas+ ACP samples

HLB violin plot
HLB violin plot

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Analytical Updates Blog

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Regulatory Program

Sample numbers plant SoCal
Sample numbers plant SoCal

Sample numbers plant statewide
Sample numbers plant statewide

Sample numbers plant SoCal
Sample numbers plant SoCal

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ACP sample numbers SoCal
ACP sample numbers SoCal

ACP sample numbers statewide
ACP sample numbers statewide

ACP sample numbers SoCal
ACP sample numbers SoCal

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biological control Program

Data courtesy Dr. David Morgan, USDA.

Tamarixia radiata releases by S
Tamarixia radiata releases by S

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Tamarixia radiata releases by C,N CA cou
Tamarixia radiata releases by C,N CA cou

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T. radiata nymph finds
T. radiata nymph finds

Tamarixia radiata releases by S
Tamarixia radiata releases by S

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flush.jpg

Numbers at a glance

Lab capacity.jpg
HLB+ trees by variety.jpg
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.