Huanglongbing, also known as citrus greening disease, is a serious bacterial disease affecting citrus trees. It is caused by the bacterium Candidatus Liberibacter and is primarily spread by the Asian citrus psyllid, an insect that feeds on the sap of citrus plants. Infected trees often show symptoms like yellowing leaves, stunted growth, and misshapen fruit, leading to reduced yields and poor fruit quality. The disease poses a significant threat to the global citrus industry, impacting crops such as oranges, lemons, and grapefruits. Once a tree is infected, there is no cure, making prevention and management strategies crucial for protecting citrus orchards.