Grafton-Cardwell, B. 1994 Resistance of California red and yellow scale in the San Joaquin valley of California.. Resistant Pest Management 6(1): 7-9.

Notes: Abstract: Discussion of insecticide resistance of two pests of citrus: Aonidiella aurantii and A. citrina, particularly Chlorpyrifos, Methidathion and Carbaryl.