Cressman, A.W. 1941 Susceptibility of resistant and nonresistant strains of the California red scale to sprays of oil and cube resins.. Journal of Economic Entomology 34(6): 859.

Notes: The promising results obtained with sprays of petroleum oil and cube and derris resins in the control of Aonidiella aurantii, have led to a study of the relative susceptibility to such sprays of strains of the scale that are resistant and nonresistant to hydrocyanic acid gas.