No cure exists for citrus greening, also called huanglongbing or HLB, a bacterial disease spread by the Asian citrus psyllid, a tiny sap feeding insect, that causes mottled leaves, misshapen fruit, and steady decline. Backyard management focuses on controlling the psyllid, keeping the tree well fed to slow its decline, and removing infected trees so they do not spread the disease.

Why can citrus greening not be cured?

Because the bacteria live inside the tree's sap carrying tissue, where sprays cannot reach them. Once a tree is infected, the disease keeps moving through it, so the goal shifts to slowing decline and stopping spread.

How is the psyllid controlled on a backyard tree?

With a systemic treatment taken up through the roots. Fruit Tree and Vegetable Systemic Soil Drench, an imidacloprid product labeled for citrus, apple, peach, and other fruit trees, is mixed in water and poured around the base of the tree.

Does feeding help an infected tree?

It can slow decline but does not stop the disease. Where a tree is losing vigor, TreeHelp Complete Citrus Spikes are pushed into the soil near the feeder roots to keep a steady supply of nutrients for up to a year.

When should an infected citrus tree be removed?

Once greening is confirmed and the tree is in clear decline. Removal takes away a source the psyllid can carry to nearby healthy trees.

Frequently Asked Questions

How is citrus greening confirmed?

With a lab test, often arranged through a local extension office, since nutrient shortages can look similar.

Can greening spread to other citrus nearby?

Yes. Psyllids that feed on an infected tree carry the bacteria to the next one.

Is fruit from an infected tree safe to eat?

Yes, though it is often small, bitter, and misshapen.

How can a new citrus tree start disease free?

By buying from a nursery that sells certified disease free citrus stock.