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Download PDF You don’t have to be Einstein to know that doing the same thing and expecting a different result is the definition of insanity. Is it time to look at managing weeds in a different light? CPM reports. Use little hammers and not sledgehammers. By Lucy de la Pasture Blackgrass has become a weed that’s driving farming strategies on many farms – its success and the failure of herbicide measures has led to changes in rotations, cultivations and herbicide use. But instead of a weed being the force behind changes in practice, could weeds be thought about in a different way and be managed more ecologically? That was the question posed by Dr Chloe MacLaren, plant ecologist at Rothamsted Research, during AHDB’s Agronomy Week. Chloe points out that the way weeds are being managed across the globe is a struggle, with 262 weed species found to be resistant to 23 of the 26 herbicide modes of action (MoA) available in an international survey published last year. Intensive use of herbicides selects for weeds with a similar growth habit, metabolism and resource requirement as the crop itself, hence the success of blackgrass as a weed. “There’s a real risk that…
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