What is their life-cycle?
Treehoppers usually have one or more generations per year. Eggs are laid singly or in masses, either inserted directly into the living tissue of their host plant, or deposited on the surface of the plant. The females of some species coat their eggs with a frothy substance that hardens when dry. In temperate regions of North America, the eggs of most species remain in the plant through the winter and hatch in the spring at approximately the same time that the overwintering buds of the host plant break open and begin to grow. The young treehoppers feed by inserting their piercing/sucking mouthparts into the plant and sucking the phloem sap. In some species, the adult female guards her eggs and remains with the young, which stay together in groups called aggregations, throughout their development which may take a month or more. Many of these gregarious species are tended by ants. The ants collect a sweet secretion called honeydew from the treehoppers and, in return, protect the treehopper
