Written by Charlotte Cunningham
Significant populations of grassweeds, could threaten winter wheat yields this year after farmers struggled to implement robust herbicide programmes in the autumn, according to Corteva. Charlotte Cunningham reports. According to the latest advice from Corteva, a contact graminicide should be a priority this spring to control grassweeds and protect yields. Where pre-emergence applications were missed, weeds will have germinated and be growing away alongside the crop, it says. Conditions across most of the country have so far prevented applications of a post-emergence graminicide. These missed controls may have resulted in larger populations of grassweeds, and plants that are at a more advanced growth stage than usual for this time of year, says Corteva. Alister McRobbie, cereal herbicide category manager at Corteva Agriscience, says: “Where winter wheat was drilled late, blackgrass may be less of a threat, but brome, ryegrass and wild oats could become a bigger issue and knock yields. But it’s been difficult – if not impossible – to get on the land to apply post-emergence products because of the wet conditions. “Getting on top of these grassweeds before they get too large is key to controlling them. Weeds left to grow larger will compete with the crop for…
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