"Literature currently available on the population dynamics of insect herbivores tends of favour a top-down regulation of abundance, owing much to the action of natural enemies. This unique volume challenges this paradigm and shows that tree-dwelling species of aphids, through competition for resources, regulate their own abundance." "Using analyses from long-term population census and experiments, this book is designed to introduce students and research workers to insect herbivore-host dynamics using the interaction between aphids and trees as a model."--Jacket.