Rabb, R.L., DeFoliart, G.K., & Kennedy, G.G. 1984 An ecological approach to managing insect populations.. Ecological Entomology. Wiley-Interscience New York 844 pp.

Notes: One concept discussed is how competition for a common resource may inhibit population growth and may displace weaker competitors. The successive establishment of three Aphytis species parasitic on Aonidiella aurantii compete directly with each other but have successfully reduced populations of their host. San José scale (Quadraspidiotus perniciosus) is mentioned as an example of insecticide resistance.