Rivnay, E. 1946 The status of Clausenia purpurea Ishii and its competition with other parasites of Pseudococcus comstocki Kuw. in Palestine.. Bulletin de la Société Fouad 1er d'Entomologie 30: 11-19.

Notes: C. purpurea, after becoming established in a grove, before long, becomes the dominant or even the only internal parasite, due to a favorable climate, and an unfavorable climate for its competititors.