CDFA Plant Health

Huanglongbing (HLB)


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Blotchy Mottle Symptom of HLB disease in Citrus leaves (Photo courtesy of CDFA Plant Pest Diagnostics Center)

The plant disease known as Huanglongbing (HLB) is believed to be caused by a phloem-restricted bacterium which is vectored by the Asian Citrus Psyllid (ACP).

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