By J. Fingas,  21m ago
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An orange tree that is infected with huanglongbing. Leaf symptoms begin on one or a few branches and slowly spread to the rest of the tree. Credit: Georgios Vidalakis, UC Riverside

Researchers at the University of California, Riverside have made an important step in understanding the molecular mechanism of huanglongbing (HLB), a destructive disease that is a serious threat to the citrus industry worldwide.

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