Add South Carolina to the list of states where citrus greening has been found.

The U.S. Department of Agriculture has confirmed than Huanglongbing, also known as HLB of citrus greening, was in a leaf sample from a residential property in Charleston, S.C.

The sample was from a mature citrus tree on a residential property near where Asian citrus psyllid was detected in August 2008, according to a North American Plant Protection Organization Pest Alert. The discovery of the greening vector prompted a follow-up survey of the area.

This is the first confirmation of citrus greening in South Carolina, according to the USDA's Animal and Plant Health Inspection Service.

USDA inspectors are trying to obtain additional information about the source of the citrus tree. They also will conduct delimiting surveys around the positive find.

The USDA and South Carolina state agricultural officials will establish a quarantine for citrus greening in Charleston County.

Since the initial discovery in Florida in 2005, the bacterial disease of citrus has spread throughout that state and has also been confirmed on three separate residential properties in two Louisiana parishes—Orleans and Washington.

The USDA has established Asian citrus psyllid quarantines in Charleston County, S.C.; parts of San Diego, Riverside and Imperial counties, Calif.; and the entire states of Alabama, Florida, Louisiana, Texas and Mississippi.