Collins, P.J., Lambkin, T.M., & Bodnaruk, K.P. 1994 Suspected resistance to Methidathion in Aonidiella aurantii (Maskell) (Hemiptera: Diaspididae) from Queensland.. Journal of the Australian Entomological Society 33(4): 325-326.

Notes: Abstract: The first indication of resistance to organophosphorus insecticides in red scale; analysis of variance revealed that two populations contained significant numbers of first instars surviving the insecticide treatment; presence of resistance to methidathion in red scale populations would limit its usefulness in pest management programs and may indicate cross-resistance to other organophosphates.