Written by Charlotte Cunningham
Following ADAS’ announcement of changes in sensitivity to ALS-inhibiting herbicides, Bayer has stressed that there are still a range of options to control brome in the field. Charlotte Cunningham reports. ADAS announced last week that researchers had isolated six UK brome populations with changes in sensitivity to ALS-inhibiting herbicides. The research found six brome samples out of 60 which showed reduced sensitivity to Broadway Star (pyroxsulam + florasulam) and Pacifica Plus (mesosulfuron + iodosulfuron + amidosulfuron). One sample of meadow brome had target site resistance while, non-target site mechanisms, which is often called metabolic resistance, was present in three samples of sterile brome and one sample each of rye-brome and great brome. The number of UK brome populations in which resistance to ALS-inhibitors has been detected and confirmed to date is relatively low, notes Roger Bradbury, Bayer’s market development manager for cereals in North Europe. “But there is good reason to be vigilant. The samples were from geographically diverse locations meaning it is likely that resistance has evolved independently in these field populations. Growers can help limit further spread of resistance by using an integrated weed management strategy across the rotation to protect the chemistry available.” Not known to be…
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