Information About Citrus Tree Disease

Citrus Disease Threatens Backyard Trees

The State of California is alerting residents about a growing threat to our local citrus trees from “Huanglongbing” disease, which is also known as HLB. The disease is spread by an insect called the Asian citrus psyllid, and while it is not harmful to humans, it is fatal for the trees.  Huanglongbing has continued to spread in Los Angeles, Orange and Riverside counties. As of October 2019, more than 1,650 infected trees have been detected and removed from these areas.

Our community plays a critical role in the effort to save backyard citrus. The State’s Citrus Pest & Disease Prevention Program recommends that you inspect any trees you may own for signs of both the disease and the insect. If you spot symptoms of the disease, call the State’s hotline at (800) 491-1899.

Your Orange Parks staff have been diligent in monitoring our trees and taking preventative steps to protect them. Our trained arborists and landscape maintenance workers are always on the lookout for signs that our trees may be under threat.

To learn more about citrus greening disease, the Asian citrus psyllid, and what you can do to help protect our California citrus trees, visit