Protect Your Citrus From a Lethal Disease

Asian Citrus Psyllid and Huanglongbing

A tiny insect no bigger than a grain of rice may go unnoticed on your citrus trees, but it could have devastating consequences for California citrus if not stopped. The Asian citrus psyllid feeds on citrus leaves and stems, and can infect citrus trees with a bacteria that causes a serious plant disease called Huanglongbing, also known as HLB or citrus greening disease. While not harmful to humans, the disease kills citrus trees and has no cure.

The best way to protect citrus trees from HLB is to stop the Asian citrus psyllid. Once a tree is infected with HLB, it will die. Diseased trees need to be removed in order to protect other citrus trees on the property, neighbors’ trees and the community’s citrus.

Why Treat?

Treating to reduce the number of psyllids is very similar to getting an annual flu shot; it may not prevent you from getting the flu, but it certainly improves your odds of not getting the disease or if you do get the flu, the flu won’t be as bad. The same is true for the citrus disease; you may still get an infected tree, but all your trees might not get infected. The more vigilant you are in treating your citrus to control the psyllids, the more likely you will be to not get the disease!


Call to Report a Pest

If you think you have spotted the pest or disease, call the free statewide pest hotline at 800-491-1899 or visit

A mobile app is also available for download to report a pest. For more information about the CDFA's mobile app, visit their website at

The Citrus Pest & Disease Prevention Program

The Citrus Pest & Disease Prevention Program is an initiative funded by California citrus growers and administered by the California Department of Food and Agriculture dedicated to combating serious pests and diseases that threaten the state’s citrus trees.Visit for more information.

For additional information on the Asian Psyllid and HLB disease and recommended treatments, visit these sites:

Abandoned - Neglected Citrus Reporting Form

ACP Factsheet

Quarantine Information

Treatment Information - Growers

Treatment Information - Residential

Insect, Disease, Quarantine and More

University of California Website for Asian Citrus Psyllid Management

ACP/HLB information from UC Riverside

CDFA Contact Info