Schoonees, J., & Giliomee, J.H. 1982 The toxicity of methidathion to parasitoids of red scale, Aonidiella aurantii (Hemiptera: Diaspididae).. Journal of the Entomological Society of Southern Africa 45: 261-273.

Notes: This study examines the addition of oil to the insecticides to reduce residual toxicity, as well as breeding and releasing populations of natural enemies that are resistant to insecticides.