For those that have never tried or did not know about this.
If you are growing sweetcorn one of the worst thing to happen to them just as they get ripe they are raided by rats and they make a great job of leaving you nothing.
Collect two litre plastic milk bottles, cut down the side opposite to the handle open it up and place it over the cob cut side downwards the rat has nothing to grip on and your cobs will be on your plate and not in the rats belly.