Local News

Local Grain Growers Beware the Redlegged Earth Mite

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Local grain growers should remain vigilant as scientists have discovered insecticide resistance in redlegged earth mites in the Grains Research and Development Corporation southern cropping region.

Recent laboratory studies on several redlegged earth mite populations in South Australia have confirmed resistance to both synthetic py-re-throids and organo-phosphates.

This is the first time resistance has been detected in Australian redlegged earth mite populations outside of Western Australia. Research suggests that whilst it is too early to determine exactly how widespread the distribution of resistance is in SA, resistant samples have come from more than one paddock.

University of Melbourne entomologist Dr Paul Umina, says further sampling will be undertaken this year to enable more detailed mapping of the extent of resistance in the southern and northern regions.

Image by CSIRO [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons

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