Written by cpm
Having a clear plan is important in getting the balance right when it comes to dealing with blackgrass and BYDV control in the autumn. CPM asks Bayer how the loss of Deter may influence spray decisions. When you add more herbicides, there is a law of diminishing returns. By Rob Jones Delayed drilling and a robust pre-emergence stack have become the foundation of grassweed control in wheat. But changes in the availability and efficacy of key active ingredients mean that this season growers have more issues to consider when planning their programme. The biggest change is the loss of neonicotinoid seed treatments for cereals, such as Redigo Deter (clothianidin+ prothioconazole). Although not directly weed control products, these seed dressings allowed farmers to focus on weed control because aphid vectors of Barley Yellow Dwarf Virus (BYDV) and slugs were controlled. A move to later drilling enables blackgrass control in stubbles and stale seedbed techniques to reduce populations before the crop is sown. BYDV control without Deter may mean that one or more insecticide applications are needed during the autumn, depending on drilling date and temperatures. Some growers may be tempted to combine herbicide and insecticide applications, but the…
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