The 'Group' letters/numbers that you see throughout this web site refer to the classification of herbicides by their site of action. To see a full list of herbicides and HRAC herbicide classifications click here.
QUIK STATS (last updated Mar 02, 2015 )
NOTES ABOUT THIS BIOTYPE
Multiple Resistant Kochia scoparia
One-fourth of the Garden City (GC) Kochia plants survived the labelled rate or higher of atrazine (PSII-inhibitor) and the surviving plants showed Ser-264 to Gly mutation in the psbA gene, the target site of atrazine. Ninety percent of GC plants survived labeled rate of dicamba, a synthetic auxin. At least 87% of the plants survived up to 72 g a.i/ha chlorsulfuron (acetolactate synthase (ALS)-inhibitor) and the analysis of the ALS gene revealed the presence of Pro-197-Thr and/or Trp-574-Lue mutation(s). Most GC plants also survived labelled rate of glyphosate (5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) inhibitor) and the resistant plants had up to five to nine EPSPS gene copies (relative to the ALS gene).
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