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 May 07, 2017 )
NOTES ABOUT THIS BIOTYPE
April 2017 Update
For Stellaria media we now have 36 verified cases of resistance to SU herbicides. Six of these populations were also resistant to florasulam. Most of these cases are seed samples sent by farmers or consultants on suspicion of resistance. They have been tested in pot experiments including a susceptible and resistant reference population. In these tests tribenuron-methyl and florasulam have been applied in 4-6 doses. A survey on untreated plots in agricultural fields all over Denmark showed that S. media was resistant to SU herbicides in 15% of the fields.
CONTRIBUTING WEED SCIENTISTS