Huanglongbing (HLB), also known as citrus greening, is the most serious disease affecting production in Asia, Africa, Americas, and Arabian Peninsula. HLB associated with α-Proteobacteria “CandidatusLiberibacter asiaticus” (CLas), “Ca. L. africanus” (CLaf), americanus” (CLam). The Bangladesh industry comprises mandarins, sweet oranges, pummelos, limes, lemons. In 2017-2018, a survey was conduct...