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.  All citrus and closely-related species are susceptible hosts for both the ACP insect and the HLB disease. There is no cure once a tree becomes infected. The diseased tree will decline in health and eventually die.

The Asian citrus psyllid is a winged insect that sort of resembles a moth. It has a light brown head and mottled brown body. The first signs of Citrus Greening Disease are seen in the leaves. There is often yellowing along the veins of leaves or a blotchy mottle of leaves. Fruit will be misshapen and bitter. Seeds that are normally white will be grayish black.

If you suspect a problem, call the CDFA Plant Pest hotline at (800) 491-1899