While significant progress has been made on reducing blackgrass numbers in the last decade, with Hutchinsons’ Cambourne site showing 60 plants/sq m instead of the 600 plants/sq m seen at the former Brampton site ten years ago, those small numbers still matter. “The problem is that these surviving blackgrass plants tiller their socks off, so we could still end up with a lot of heads and a lot of seed return. Uncontrolled, a blackgrass population of 50 plants/sq m could deliver a seed return of 150,000 seeds/sq m,” says Dick Neale, technical manager. To help growers keep on top of…