A disease called “citrus greening” has devastated and permanently altered citrus production in the United States, but a vaccine that could protect orange trees may be part of a winning strategy to beat the bacteria that is killing the trees.

Citrus greening, also known as Huanglongbing (HLB), was discovered in Florida in 2005. The disease is caused by a bacterium by the name of “Candidatus Liberibacter asiaticus” and has already attacked citrus groves in at least 40 countries around the world.

The bacteria infects the tree, consuming nutrients and sugars used by the tree to sustain itself… more

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