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 Sep 15, 2000 )
NOTES ABOUT THIS BIOTYPE
Population of R biotype is very high (up to two thousand plants/m2 in many places. Resistance is of a metabolic nature, photosynthesis recovers fourth day after treatment.
CONTRIBUTING WEED SCIENTISTS