Clausen, C.P. 1958a The biological control of insect pests in the continental United States.. Proceedings of the Tenth International Congress of Entomology. Vol. 4. Ottawa 1115 pp.

Notes: [Conference held August 17-25, 1956 in Montreal, Canada] This history of biological control projects includes target pests such as Aondidiella aurantii, A. citrina, Icerya purchasi, Lepidosaphes beckii, Parlatoria oleae, Pseudococcus adonidum, P. citri, P. gahani, Saissetia nigra and S. oleae.