INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
Meadow Brome (Bromus commutatus) is a monocot weed in the Poaceae family. In United Kingdom this weed first evolved resistance to Group 2 (Legacy B) herbicides in 2020 and infests Wheat. Group 2 (Legacy B) herbicides are known as Inhibition of Acetolactate Synthase
(Inhibition of Acetolactate Synthase
). Research has shown that these particular biotypes are resistant to iodosulfuron-methyl-Na, mesosulfuron-methyl, and pyroxsulam and they may be cross-resistant to other Group 2 (Legacy B) herbicides.
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.
|Inhibition of Acetolactate Synthase
HRAC Group 2 (Legacy B)
|iodosulfuron-methyl-Na, mesosulfuron-methyl, and pyroxsulam
|Contributors - (Alphabetically)
|Greenhouse, and Laboratory trials comparing a known susceptible Meadow Brome biotype with this Meadow Brome biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.
|Genetic studies on HRAC Group 2 resistant Meadow Brome have not been reported to the site. There may be a note below or an article discussing the genetics of this biotype in the Fact Sheets and Other Literature
|Studies on the mechanism of resistance of Group 2 (Legacy B) resistant Meadow Brome from United Kingdom indicate that resistance is due to an altered target site, and enhanced metabolism. There may be a note below or an article discussing the mechanism of resistance in the Fact Sheets and Other Literature
|There is no record of differences in fitness or competitiveness of these resistant biotypes when compared to that of normal susceptible biotypes. If you have any information pertaining to the fitness of Group 2 (Legacy B) resistant Meadow Brome from United Kingdom please update the database.
RSK ADAS Ltd
Boxworth, CB23 4NN, Cambridge
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|Drag a column header and drop it here to group by that column
iodosulfuron-methyl-Na, mesosulfuron-methyl, and pyroxsulam
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site. Citation:
Heap, I. The International Herbicide-Resistant Weed Database. Online.
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