Asian citrus psyllids on citrus leaves

Adult asian citrus psyllids feeding on a citrus tree.

New ACP quarantine established in Tulare County, Calif.

86 square miles in the Exeter area of Tulare County, Calif. is now under a quarantine for the Asian citrus psyllid. 

An additional portion of Tulare County, Calif., has been placed under quarantine for the Asian citrus psyllid (ACP) following the detection of one psyllid near the City of Exeter. 

The new quarantine zone measures 86 square miles in Tulare County. It is bordered on the north by Yokohl Creek; on the east by Road 244; on the south by Avenue 220; and, on the west by Road 156.  This area is in addition to existing quarantines in the Porterville and Dinuba areas of Tulare County. A link to the map may be found at: [4]

There is now about 350 acres of ACP quarantine within Tulare County.

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The quarantine prohibits the movement of host nursery stock out of the quarantine area. A compliance agreement allows nursery stock and bud wood to move out of the area if grown in USDA-approved structures designed to keep ACP out. Also under the terms of a compliance agreement, citrus fruit may move out of the area if cleaned of leaves and stems, or if from a grove that was treated prior to harvest. Residents with backyard citrus trees in the quarantine area are asked not to remove fruit from the area.

Compliance agreement documents specific to Tulare County are available at  [6]

In addition to the quarantine in Tulare County, ACP quarantines are now in place in Fresno, Imperial, Kern, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, and Ventura counties 

The ACP is an invasive species of grave concern because it can carry the disease Huanglongbing (HLB), also known as citrus greening. All citrus and closely related species are susceptible hosts for both the insect and the disease. There is no cure once a tree becomes infected. The diseased tree will decline in health until it dies.  

HLB has been detected just once in California – last year on a single residential property in Hacienda Heights, Los Angeles County. HLB is known to be present in Mexico and in parts of the southern U.S. HLB was recently confirmed in a residential tree in Mission, Texas.

Florida first detected the ACP in 1998 and HLB in 2005, and the two have been detected in all 30 citrus-producing counties in that state. The University of Florida estimates the disease is responsible for more than 6,600 lost jobs, $1.3 billion in lost revenue to growers, and $3.6 billion in lost economic activity. The disease is also present in Georgia, Louisiana, South Carolina and Texas. The states of Alabama, Arizona, Hawaii, and Mississippi have detected the pest but not the disease.

 Residents in the area who think they may have seen the Asian citrus psyllid are urged to call CDFA’s Pest Hotline at 1-800-491-1899.  For more information on the ACP and HLB visit [7].