DeBach, P., Fleschner, C.A., & Dietrick, E.J. 1949 California red scale studies in possible control by employment of natural enemies.. California Agriculture 3(3): 12, 14.

Notes: Aonidiella aurantii, the most important pest of citrus, is attacked by several natural enemies. This research is a preliminary attempt to determine why red scale insecticides can be abandoned in some groves with satisfactory results, and then to learn how safe it is to follow such a program.