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 Feb 07, 2014 )
NOTES ABOUT THIS BIOTYPE
This biotype is moderately resistant to metamitron preplant incorporated (PPI) (resistance index RI = 75) and low level resistant to metamitron applied postemergence (POST) (RI = 7); it is highly resistant to metribuzin (POST) (RI > 100) and moderately resistant to metribuzin (PPI) (RI = 62-70). [(PhD theses: Els Mechant (2011) and Jonas Aper (2012)]. It resembles the atrazine resistant C. album biotype (selected in maize during the 1980’s). However, most of the metamitron-resistant populations were selected by metamitron (sugar beet) or metribuzin (potato grown in rotation with sugar beet).
This biotype is highly cross-resistant to: atrazine and terbuthylazine (RI >1000), and moderately cross-resistant to chloridazon (RI = 10-16). It is also low level cross-resistant to lenacil (RI = 5) and linuron (RI = 2). It is susceptible to negative cross-resistant to bentazon (RI=0.6), ioxynil, aclonifen, clomazone, mesotrione, pendimethalin, acetochlor, dimethenamid-P, flufenacet, pethoxamide, S-metolachlor, ethofumesate and triallate (PhD thesis Els Mechant).
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