by their host plants. Ant collection of honeydew is theorized to allow treehoppers to have to compete less and feed more, according to the feeding facilitation hypothesis.

Eggs are laid by the female with her saw-like ovipositor in slits cut into the cambium or live tissue of stems, though some species lay eggs on top of leaves or stems. The eggs may be parasitised by wasps, such as the tiny fairyflies