Delphastus is a small, shiny, black beetle, about one quarter the size of a ladybug, which feeds on several species of whitefly including greenhouse, sweet potato (silverleaf) and avocado whitefly. If whitefly are not present they will also feed on spider mites. Both the adult beetle and larvae are predators and will eat whitefly eggs and larvae, but not adult whiteflies. Each container includes 25 live adults.