CDFA Plant Health

Asian Citrus Psyllid (ACP) Treatment Information

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The Asian citrus psyllid (ACP) is a pest that acts as a carrier or vector spreading "huanglongbing" (HLB), a devastating disease of citrus trees. This bacterial disease is transmitted to healthy trees by the psyllid after it feeds on infected plant tissue.

Treatment Notification Information


Proclamation of an Emergency Program (PEP)





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Treatment Boundary Maps

Fresno County

Imperial County

Kern County

Los Angeles County

Madera County

Orange County

Riverside County

San Benito County

San Bernardino County

San Diego County

San Joaquin County

San Luis Obispo County

San Mateo County

Santa Barbara County

Santa Clara County

Stanislaus County

Tulare County

Ventura County

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CDFA YouTube

HLB Tree Removal in Southern California

Video documentation of California's first ever citrus tree diagnosed with the deadly Huanglongbing disease being removed from a Southern California residence in 2012.(3:12)

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