Novel insight into the distribution and dissemination of Candidatus Liberibacter asiaticus, the causal agent of citrus Huanglongbing.

Huanglongbing (HLB), also known as citrus greening, is the most severe pandemics in citrus in more than 50 countries in Asia, Africa and America, causing serious economic losses worldwide (Gottwald, 2020; Wang, 2019). The disease is associated with a phloem-limited and fastidious member of the α-proteobacteriacea. 'Candidatus Liberibacter asiaticus' (CLas) is the most prevalent strain. It was frequently detected in leaves, stems and roots based on PCR detection which recognized both living and dead cells.