Abstract
Citrus Huanglongbing (HLB) is currently the most devastating citrus disease worldwide. HLB, first identified in Asia, and its insect vector, the Asian citrus psyllid (ACP), are quickly spreading in citrus-producing areas in South America and North America. The main challenges for HLB control include the phloem-limited biology of Candidatus Liberibacter spp., the causal agent of HLB, which shields the pathogen from treatments, difficulty in controlling and containing the psyllid vectors, and lack of citrus varieties with resistance against HLB and ACP. This review is not intended to be comprehensive; instead, we focus on the virulence factors of Ca. L. asiaticus and the control approaches against HLB and ACP to complement other papers covering different aspects of HLB pathosystems of this issue.
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