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Download PDF Changing field conditions and grower practices may have shifted the spring weed spectrum. CPM gathers in-field advice and hosts a webinar to highlight best practice. Overall, we’ll see a reduction of autumn-germinating weeds, but a greater diversity of species emerging. By Tom Allen-Stevens and Rob Jones Unprecedented wet weather and changing cropping practices are presenting growers with different weed challenges in the spring, according to experts. Conservation agriculture is bringing a more diverse range of weed species into cereal crops, while one of the wettest Februaries on record in 2020 led groundsel to become the focus of herbicide control for many growers across the UK. James Rimmer, independent agronomist at CCC, explains that adverse weather confounded efforts by growers to control the weed during the 2019/20 growing season. Groundsel can grow happily in the base of cover crops and has an incredibly high seed return, with seed surviving for up to seven years in the soil profile. “The wet weather across the country led to delayed drilling and as a result, some residual herbicides were not applied which allowed groundsel to dominate. It established in every system, till or no-till, and reproduced very quickly before it could be…
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