Ordish, G. 1967 . Biological Methods in Crop Pest Control. Constable and Company, Ltd. London 242 pp.
Notes: The history, theoretical considerations, and agents of biological control are discussed in relation to diseases, weeds and economics. Species mentioned as targets of biological control projects include Aspidiotus destructor, Dactylopius ceylonicus, D. opuntiae, Diaspis pentagona, Eriococcus ovariensis and Icerya purchasi.