Wille, J.E. 1937 . [Report of the biological control of olive maggots in the Valle del Yauca and various pests in the Valle de Chanchamayo.] Informes sobre el control bi Instit. de Altos Estudios Agricolas del Peru Lima, Peru 16 pp.

Notes: Scale species mentioned include Saissetia oleae, Gossyparia, Lepidosaphes beckii, Selenaspidus articulatus, Lecanium hesperidum and Pseudococcus.