A psyllid is a small, sap-sucking insect belonging to the family Psyllidae. These insects are often found on plants, where they feed on the sap from leaves and stems. Psyllids can be recognized by their distinctive jumping ability and their resemblance to miniature cicadas. They are known to affect a variety of plants, including crops and ornamental species. Psyllids can also be vectors for plant diseases, such as Candidatus Liberibacter, which is associated with huanglongbing in citrus plants. Their feeding can lead to stunted growth, leaf curling, and other damage, making them a concern for agriculture and gardening. Effective management strategies are essential to control their populations.