New Residual Herbicide From Bayer: Bayer has brought a new residual pre-emergence herbicide to the UK market, adding another product to the amenity contractor’s armoury. Lewis Blois, Bayer national account manager, says Valdor® Flex (MAPP:19033) contains a unique new formulation. “The pre-emergence herbicide contains two active ingredients, that prevent the emergence of a broad spectrum […]