Abstract
Huanglongbing is the most destructive citrus disease at present. In Brazil, it is associated with Candidatus Liberibacter asiaticus and Ca. L. americanus, which colonize the phloem causing gradual leaf and fruit drop and plant decline. Here. L. asiaticus is the most aggressive and widespread in citrus regions. The study of C. sinensis grafted onto C. limonia cv. Pears with and without HLB…