DeBach, P., Huffaker, C.B., & MacPhee, A.W. 1976 Evaluation of the impact of natural enemies.. Theory and Practice of Biological Control. Academic Press New York 788 pp.

Notes: Parlatoria oleae and its two parasites in California is discussed. Aonidiella aurantii is discussed as an example of the exclusion method. Coccus hesperidum, Planococcus citri and Saissetia oleae are discussed in relation to the biological check method. Lecanium coryli is mentioned as an example of the insecticide check method.