I am fairly sure that my potaotes have been hit by Phytophthora infestans but I just wanted to check with people who may know better than me before I take any action. Are the brown and dying leaves in the 2 pictures below a result of blight? If yes, should I pull all the potatoes immediately before the blight spreads? I have 2 rows- about 5m by 0.3m and about 80 seeds which were put down in mid May. The potatoes are bionica which are supposed to be blight resistant but I was told that no breed are entirely blight resistant. Cheers.