Australian Journal of Entomology (2008) 47, 361-364

Grant A. Herron, Tanya M. James, Jeannette Rophail and Jianhua Mo (2008)
Australian populations of onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae), are resistant to some insecticides used for their control
Australian Journal of Entomology 47 (4), 361-364
Abstract: Onion thrips, Thrips tabaci Lindeman, is a major pest of Australian field onion Allium cepa Linnaeus with their control heavily reliant on a few insecticides. An earlier study after grower complaints of control failures did not detect resistance in three populations. After testing an additional nine populations via a Potter spray tower laboratory bioassay unequally against alpha-cypermethrin, diazinon, dimethoate, lambda-cyhalothrin, malathion and methidathion, we document resistance in T. tabaci for the first time in Australia. The maximum difference in response (resistance) for each insecticide was detected by dividing the most resistant LC₅₀ response by the least resistant LC₅₀ response. Comparison of the most susceptible to the least susceptible population tested produced alpha-cypermethrin and lambda-cyhalothrin resistance at 164- and 606-fold, respectively. Diazinon and dimethoate resistance was also detected at 27-fold and 5.2-fold respectively although omethoate, malathion and methidathion resistance were not detected.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Grant A. Herron, Jianhua Mo

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.
	Thrips tabaci	Onion/garlic/leek (Allium)