An additional portion of Madera
County has been placed under quarantine for the Asian citrus psyllid (ACP)
following the detection of one psyllid east of the City of Madera, in the
Bonadelle Ranchos-Madera Ranchos area.
The quarantine expansion adds 79
square miles, bringing the total quarantine
area in Madera County to 179 square
miles. The 79 square mile expansion is bordered on the north by Avenue 15; on
the south by Avenue 9; on the west by Main Canal; and on the east by State
The quarantine prohibits the
movement of citrus and curry tree nursery stock out of the quarantine area and
requires that all citrus fruit be cleaned of leaves and stems prior to moving
out of the quarantine area. An exception may be made for nursery stock and
budwood grown in USDA-approved structures that are designed to keep ACP and
other insects out.
Residents with backyard citrus trees
in the quarantine area are asked not to transport citrus fruit or leaves,
potted citrus trees, or curry leaves from the quarantine area.
In addition to a portion of Madera
County, ACP county-wide quarantines are now in place in Imperial, Los Angeles,
Orange, Riverside, San Bernardino, San Diego, Santa Barbara, Tulare, and
Ventura counties, with portions of Fresno, Kern, San Joaquin, San Luis Obispo,
and Santa Clara counties also under quarantine.
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, such as curry
trees, are susceptible hosts for both the insect and disease.
There is no cure once a tree becomes
infected, the diseased tree will decline in health and produce bitter,
misshaped fruit until it dies. HLB has been detected just once in California –
in 2012 on a single residential property in Hacienda Heights, Los Angeles
County. This plant disease does not affect human health.
Residents in the area who think they
may have seen ACP or symptoms of HLB on their citrus trees are urged to call
CDFA’s Pest Hotline at 1-800-491-1899. For more information on the ACP and HLB,
please visit the website established by the California Department of Food and
Growing Produce, March 27, 2015
Extension Fruit Crops Specialist
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