I've had problems with eaten silks too. Seems to be earwigs that are eating/cutting my silks also eating some of the tassels :( They have been a right nuisance this year and I guess will be doing more damage if they have managed to get in with the developing cobs. Agree with Goodlife's advice, expose a bit of silks and hand pollinate if you have available pollen.
Is anyone else growing some sweet corn nearby, perhaps they would be ok with you collecting a little pollen as long as it is a suitable type? Seems a shame to miss out.