Citrus Huanglongbing (HLB) is the most devastating citrus disease worldwide. In this paper. a deterministic dynamical model is proposed to explore the transmission dynamics of HLB between citrus tree and Asian citrus psyllid (ACP). Using the theory of dynamical system. https://www.bekindtopets.com/great-deal-Psithurisme-Definition-Affiche-great-choice/