Notification of Huanglongbing (HLB) and Asian Citrus Psyllid (ACP) Survey and Treatment

Dear Resident:

An Asian Citrus Psyllid (ACP) positive for the bacteria that causes a citrus tree disease called Huanglongbing (HLB) has been detected in your neighborhood. HLB is transmitted from tree to tree when an infected ACP feeds on citrus host trees. Citrus trees infected with the HLB disease produce bitter and misshapen fruit and the tree will die from this disease. The presence of ACP infected with the bacteria indicates that there are trees with HLB in your area. HLB and ACP pose no risk to human health, however, it is a significant threat to California’s residential and commercially grown citrus trees.

To find the HLB-infected citrus trees in your neighborhood, the California Department of Food and Agriculture (CDFA) is conducting a survey of all citrus trees within your area for any signs of HLB. CDFA will also be treating citrus trees in your area to suppress ACP populations. A CDFA inspector will wear a CDFA shirt and have an official CDFA identification badge while conducting the survey. An inspector will come to your residence within the next month to perform the survey and treatment. It is imperative that they have access to your property to inspect and treat all citrus trees and other closely related host plants that ACP may feed upon. ACP and leaf samples may be taken and tested for HLB.

To detect HLB at an early stage and to prevent the continued spread of the disease, inspectors may need to survey your trees several times throughout the year. By allowing CDFA staff to survey and treat the citrus trees on your property, you will be making a huge contribution to the suppression of this invasive pest and disease.

Due to the heightened sensitivities and concerns of COVID-19, CDFA staff will maintain social distance, wear gloves, and face masks while conducting their activities. This will allow CDFA staff to conduct their essential pest prevention work while keeping you, our communities, and our staff safe.

Survey and treatment are free of charge. Please call our toll-free PEST HOTLINE (800)-4911899 or visit if you have any questions regarding the survey or treatment on your property.

Thank you for your cooperation.

View PDF