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!

A mobile phone screenshot of the California Department of Food & Agriculture mobile application to report a pest.

Call to Report a Pest

If you think you have spotted the pest or disease, call the free statewide pest hotline at –1-800-491-1899 or visit California Department Of Food And Agriculture.

A mobile app is also available for download to report a pest.

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.