Written by Charlotte Cunningham
Heavy rains that interrupted autumn drilling could also further compromise pre-emergence herbicide applications. Growers should now consider options for peri-emergence treatments to target early grass weed control. Charlotte Cunningham reports. Syngenta technical manager, Georgina Wood, says pre-emergence applications made as soon as possible after drilling have been shown to consistently achieve optimum results. “But if weather conditions mean that’s not been possible, there’s still the chance to make a significant difference to grassweed populations with peri-emergence treatments this autumn.” For most growers the priority remains getting fields drilled, particularly after the difficult experiences of last autumn, but losing focus on grassweed control could cause future headaches, she warned. With relatively warm soils crops are emerging rapidly, which limits the opportunity for pre-em treatments. Furthermore, with the recent and forecast of heavy rain, some growers and agronomists may have scaled back pre-em herbicide stacks. “Where pre-em treatments have been reduced or missed, it will really focus the attention on getting the best possible results from Defy-based peri-em applications. “The positive is that there is good soil moisture to optimise efficacy and follow up treatments will give prolonged residual activity against later germinating blackgrass seedlings.” Research at the Barton Blackgrass Innovation Centre…
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