Journal of the Australian Entomological Society (1994) 33, 325-326

P.J. Collins, T.M. Lambkin and K.P. Bodnaruk (1994)
Suspected resistance to methidathion in Aonidiella aurantii (Maskell) (Hemiptera: Diaspididae) from Queensland
Journal of the Australian Entomological Society 33 (4), 325-326
Abstract: The first indication of resistance to organophosphorus insecticides in red scale, Aonidiella aurantii, from Australia is noted from the Mundubbera region, Queensland. Samples of scale-infested fruit were dipped in a commercial formulation of methidathion and the mortality of sessile first instars was recorded. 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.
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Database assignments for author(s): Patrick J. Collins

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aonidiella aurantii	Citrus (genus)	Australia (NT+QLD)