The pathogen, Liberobacter asiaticum , is a phloem limited bacteria. Fortunately, it has not been found in the Western Hemisphere, and no disease resembling greening or huang long bing has been reported in citrus in South or Central America. The interaction between the vector and the pathogen is poorly known. There are conflicting reports as to whether Liberobacter spp. Characteristically, they sit at an angle to the shoot or leaf on which they feed.
Adults are very active jumping insects.
Nymphs are green or dull orange. They feed on leaves and stems and can be very difficult to see. Asian citrus psyllids are most likely to be found on new shoots, and population increase occurs during periods of active plant growth. Asian citrus psyllids evidently are restricted to citrus and closely related Rutaceae. The preferred host is Murraya paniculata , an ornamental that is widely grown in southern Florida.