Elzen, G.W., & King, E.G. 1999 Periodic release and manipulation of natural enemies.. Handbook of Biological Control: Principles and Applications of Biological Control. Academic Press San Diego et al. 1046 pp.

Notes: The authors of this chapter consider the use of natural enemies in a "rational insect management program that considers all available methods, such as selective use of pesticides, use of semiochemicals and/or supplements of natural enemies." Species listed as target pests in a table include California red scale, citrus mealybug and brown soft scale.