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Download PDF Could bromes be the next super weed? Results from a four-year AHDB project reveal that they certainly deserve careful management to avoid becoming increasingly problematic to control. CPM finds out more. Growers should be alert to the risk of rapid herbicide resistance evolution. By Lucy de la Pasture On many farms it’s blackgrass that drives herbicide strategies and over the past decade the active ingredients and timing have evolved to counter this increasingly difficult to control weed. One of the effects of the move towards stacking residuals early in the season, instead of relying on post-emergence herbicides, and increased use of minimal cultivations has been that brome species appear to have taken advantage. AHDB’s Dr Paul Gosling says that bromes were reported to be a growing problem by agronomists and growers but there was little data available on the distribution of the five species of brome or the effect it was having on cropping systems. Equally there was no evidence to suggest whether incidences of poor brome control were due to management practices or were the first signs of resistance developing. The ‘soft’ brome species – rye brome, meadow brome and soft brome – can be particularly hard…
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