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 Aug 16, 2013 )
NOTES ABOUT THIS BIOTYPE
For the perennial ryegrass populations, we have three separate populations, and the level of resistance in each is 30-fold, 13-fold and 10-fold respectively. The PhD student who is lead author of this paper is currently working on mode of action and genetic studies for these populations, and has just about finished a quick cross-resistance study.
CONTRIBUTING WEED SCIENTISTS