Citrus greening is one of the most serious citrus plant diseases in the world. It is also known as Huanglongbing (HLB) or yellow dragon disease. Once a tree is infected, there is no cure. While the disease poses no threat to humans or animals, it has devastated millions of acres of citrus crops throughout the United States and abroad. Source SaveOurCitrus.org
Check out this map of affected areas and see how widespread this disease is. Source: SaveOurCitrus.org
Learn more about this disease and how some laboratories are looking at possible solutions to fighting this disease.