Knotgrass concerns for fast-emerging sugar beet

Fast sugar beet emergence might mean earlier herbicide applications might be required, the latest British Beet Research Organisation report says.

Some growers using the FAR (frequently applied residual) technique have already started treatments.

Of particular concern are the large numbers of knotgrass emerging in some fields, it says. “Do not delay treatment as this weed becomes more difficult to control once its true leaves emerge. Use at least 1 litre/ha of a 700g ai/ha metamitron as the residual herbicide in first sprays and, if conditions are dry, comsider using ethofumesate and/or desmedipham to increase control,” it advises.

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