Psyllidae, commonly known as psyllids or jumping plant lice, are small insects belonging to the order Hemiptera. They are typically found on the leaves of various plants, where they feed on sap. Psyllids can be recognized by their distinctive jumping ability and their resemblance to miniature cicadas. These insects are known for their role as pests in agriculture, as some species can transmit plant diseases, such as Candidatus Liberibacter, which affects crops like citrus. Effective management of psyllid populations is essential to protect plant health and agricultural productivity.