New citrus disease affects commercial growers not backyard growers
By Mark Tancig. Since many local residents are enjoying their citrus trees these days, I thought I should share the latest update on this disease and what citrus growers in north Florida can do to monitor for its presence. First of all, citrus greening is a bacterial disease, believed to be caused by the bacterium Candidatus Liberibacter asiaticus. Until , when a Chinese researcher concluded it was an infectious disease, many folks thought it was associated with nutrient deficiencies or other citrus diseases. In , it was discovered in south Florida and is now present in most commercial groves throughout central and south Florida. The bacterium is spread from tree to tree by a small insect, known as the Asian citrus psyllid Diaphorina citri.
Fresh Citrus at Risk From Devastating Disease | UC Davis
After just a decade, virtually every citrus tree in the state was dying or infected. Then in , the disease — Huanglongbing, commonly known as citrus greening — was discovered in California. It showed up first in a Hacienda Heights backyard, on a pummelo branch derived from budwood that had been smuggled from China, where the disease is epidemic. In mid, however, a new sampling method and improved detection technology led to the discovery of far more HLB-positive trees in California: 1, as of March
An Asian citrus psyllid. Scientists have found a more efficient way to infect experimental trees with citrus greening disease, boosting efforts to find citrus varieties that are able to resist the bacterium which causes the disease. At the same time, their research has produced an unexpected bonus: a new strategy that growers can use to protect their trees against insects that transmit the disease, which threatens groves nationwide.
Help Florida Citrus growers control Citrus Greening. Order your free biological control wasps now! Citrus Greening is a disease that affects all cultivars of citrus and has become a real problem for both commercial citrus growers and backyard gardeners throughout the state of Florida. This disease is caused by a bacterium called Candidatus Liberibacter asiaticus. A little insect called the Asian citrus psyllid transmits this disease by feeding on the leaves of our citrus trees.