With more aggressive blight strains that have a shorter 3 or 4 day life cycle and higher spore production, stronger fungicides that can hit blight at every stage are required. Paul Goddard of BASF says that now Invader (dimethomorph and mancozeb) has a robust higher rate of 2.4 kg/ha, it has just about everything you could ask for in a modern blight fungicide and integrates well into any blight programme. More