The risk of late blight could be high this season following the exceptionally mild winter, which has helped the pathogen survive on volunteers and discard piles. This has given the pathogen, which is already around at low levels, a head start, warns researcher David Cooke, at the James Hutton Institute. With planting getting under way, growers must tackle these sources, otherwise it is the equivalent of reducing the rotation to zero, he says. See also: Warm winter could herald potato blight […]