Figure 1From: Identification of a self-regulatory pheromone system that controls nymph aggregation behavior of rice spittlebug Callitettix versicolor The spittle masses and aggregation behavior of C. versicolor nymphs. (a) The nymphs covered themselves with spittle masses at the roots of rice; (b) The spittle masses produced by nymphs; (c) The aggregation of second and third instar nymphs in one spittle mass; (d) The aggregation of two fifth instar nymphs in one spittle mass.Back to article page