is it ill or ust pretending?

[caitnrosies mum]

Just come back from my lottie where I was stopped by a fellow lottie lady and asked about the health of my sweetcorn, hers has got leaves that are yellowing and looking cobwebby on closer inspection mine are looking similar but not quite as advanced, are they doomed or will they recover can anyone help please i am new to this and thought my corn was growing great guns.