CDFA Plant Health

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Asian Citrus Psyllid (ACP) / Huanglongbing (HLB)

 •  Pest Hotline: 1-800-491-1899

The Asian citrus psyllid (ACP) is a pest that acts as a carrier or vector spreading "huanglongbing" (HLB), a devastating disease of citrus trees. This bacterial disease is transmitted to healthy trees by the psyllid after it feeds on infected plant tissue.

Save Our Citrus

Are you worried that your orange tree looks sick? Are your citrus fruits misshapen or discolored? Think your citrus trees might have a disease? Send a photo with this free app and help save our citrus.
Save Our Citrus App The SAVE OUR CITRUS app is a free iPhone application from the United States Department of Agriculture (USDA) that makes it easy to report and identify the four leading citrus diseases: citrus greening, citrus canker, citrus black spot and sweet orange scab. Report your symptoms, upload a photo and receive a response back from citrus experts.
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Get information about these citrus diseases and affected areas in the United States. The app includes information and diagnostic tools for all four diseases. Make sure your citrus is healthy and help stop the spread of these incredibly destructive citrus diseases.

About ACP and HLB

This website has been designed to help answer questions about ACP and HLB and the threat to all California citrus growers both in commercial and backyard settings.

All citrus and closely-related species are susceptible hosts for both the ACP insect and the HLB disease. There is no cure once a tree becomes infected. The diseased tree will decline in health and eventually die.

It is important to stress that CDFA conducts field surveys for ACP and other pests statewide. Recent detections of ACP in Tijuana, Mexico, reemphasize the importance of increased surveillance for ACP in neighboring San Diego County.

Survey methods for ACP include visual inspections of citrus trees by CDFA and county field inspectors, "sweep netting" for insects, and the placement of yellow panel "sticky traps" in host trees and shrubs in citrus nurseries, commercial citrus-producing areas and residential properties throughout the state. Additionally, sticky traps are placed at California fruit packing houses, specialty markets, retail stores and airports that receive such produce from areas known to be infested with ACP.

CDFA and county agricultural commissioners have educational posters and pamphlets on ACP and HLB. CDFA partners with the USDA, the University of California, California citrus associations and other stakeholders on outreach and research efforts against this insect and the disease it spreads.

Contact the CDFA Toll-Free Pest Hotline (1-800-491-1899) to report suspicious insects or disease symptoms in your citrus trees. Help us protect California agriculture from invading pests and diseases.

CDFA YouTube

HLB Tree Removal in Southern California

Video documentation of California's first ever citrus tree diagnosed with the deadly Huanglongbing disease being removed from a Southern California residence in 2012.(3:12)

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