Chapter 10. A. P. Gutierrez, L. E. Caltagirone, W. Meikle. 1999. Evaluation of results: Economics of biological control. Pages 243-252. In: Thomas S. Bellows, T. W. Fisher, L. E. Caltagirone, D. L. Dahlsten, G. Gorth, C. B. Huffaker. 1999. Handbook of Biological Control: Principles and Applications of Biological Control. San Francisco CA: Academic Press, 1046 pages.

Keywords: naturally occurring biological control, estimating the benefits and costs of classical biological control, examples given, justifying the need for biological control, biological control as an alternative to pesticide usage