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Invasive Spotlight: Asian Citrus Psyllid and Huanglongbing Disease
Published on: June 3, 2018
Oranges
Oranges

As part of our coverage of California Invasive Species Action Week, today we focus on a pair of invasive species that “work” together: an insect called the Asian citrus psyllid and the plant disease it can spread, huanglongbing.

Our long-time readers will know that we write about these pests quite a bit. That's because this pest pair has the potential of causing profound economic harm to the California citrus industry. So please read on and found out what you can do to help.

The Basics

The Asian citrus psyllid (ACP) is a very small flying insect that feeds on citrus plants...

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Tags: ACP (27), Asian citrus psyllid (25), citrus (12), disease (28), economic harm (1), HLB (23), huanglongbing (32), Invasive (29), pest (60), UC IPM (167)
Focus Area Tags: Economic Development, Food, Pest Management, Yard & Garden
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You can help prevent a deadly disease from destroying California's citrus
Published on: August 3, 2017
There is no known treatment for huanglongbing, which kills citrus trees.
There is no known treatment for huanglongbing, which kills citrus trees.

The incurable citrus tree disease huanglongbing, or HLB, has been detected in Los Angeles and Orange counties and most recently in 

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Tags: asian citrus pysllid (1), citrus (12), disease (28), Grafton-Cardwell (7), greening (3), HLB (23), huanglongbing (32), Kan-Rice (1), Riverside (4)
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Riverside tree found infected with citrus greening disease
Published on: July 26, 2017
The tiny Asian citrus psyllid can transmit the deadly disease, huanglongbing (citrus greening).
The tiny Asian citrus psyllid can transmit the deadly disease, huanglongbing (citrus greening).

The California Department of Food and Agriculture (CDFA) and the United States Department of Agriculture (USDA) have confirmed the detection of the citrus disease known as Huanglongbing (HLB), or citrus greening, in Riverside County. The disease was detected in plant material taken from a grapefruit tree...

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Tags: ACP (27), Asian citrus psylld (13), citrus (12), disease (28), HLB (23), huanglongbing (32), pest (60), Riverside (4), tree (15), UC IPM (167)
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Huanglongbing Detected Again in San Gabriel
Published on: April 6, 2017
Citrus tree infected with Huanglongbing. [M.E. Rogers]
Citrus tree infected with Huanglongbing. [M.E. Rogers]

The following press release was distributed on March 28, 2017 by the Citrus Pest & Disease Prevention Program.

The California Department of Food and Agriculture crews conducting intensive, risk-based surveys detected eight citrus trees confirmed to be infected with Huanglongbing. All trees were in the core area of San Gabriel where HLB has previously been detected. This brings the total number of HLB-positive trees in California to 46.

CDFA routinely conducts HLB surveys throughout the state based on a risk model that considers factors that may make an area more likely to have a presence of the disease. CDFA has further fine-tuned this approach by increasing the number of samples pulled from citrus trees...

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Tags: Asian citrus psylld (13), California Department of Food and Agriculture (1), CDFA (10), citrus (12), huanglongbing (32), san gabriel (2), UC IPM (167)
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Huanglongbing Detected in Cerritos, Los Angeles County
Published on: January 3, 2017
HLB symptoms on citrus
HLB symptoms on citrus

[News release from the Citrus Pest & Disease Prevention Program]

An intensive risk survey in Cerritos, Los Angeles County, resulted in the discovery of Huanglongbing in a single orange tree. California Department of Food and Agriculture staff began the survey after a sample of Asian citrus psyllids from the area was found to be positive for the bacteria that causes HLB.

The diseased tree was located across the street from the property where bacteria-carrying psyllids were detected. PCR testing confirmed the disease yesterday, but the diseased tree was actually removed last week thanks to the homeowners proactively...

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Tags: ACP (27), ANR (5), Asian citrus psylld (13), citrus (12), HLB (23), huanglongbing (32), invasive (29), pest note (3), quarantine (9)
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