Many decisions to manage crop establishment pests should be made well before sowing when there are far more control options available... Extremely high levels of resistance to several synthetic pyrethroids (> 200,000 fold in the case of bifenthrin) were detected using laboratory bioassays, and this has translated to significant yield losses in the field... Further properties with insecticide resistance have been detected since 2010, although at this stage, resistance has not been detected outside of WA. Experts predict resistance in RLEM will spread to other states, including to Victoria...
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