OK you master gardeners, I have a question for you. For the last several years something has been digging up my corn seed , sometimes the same day I plant it , but usually within just a few days. Also digging up the corn shortly after it sprouts . The holes are about the size of a quarter. Sometimes the seed is eaten , sometimes not . If the sprouts are dug up , same thing, sometimes the seed is eaten sometimes not.

I have tried everything ; spray , seven dust, coffee grounds , row covers, even got desperate this year and tried moth balls. Nothing works .

Is it moles , voles , chipmunks ? I don't see any mole hills but we do have lots of voles and chipmunks.

They don't touch any other seed , not the beans, cucumbers, squash, nothing else at all.

Thanks in advance for your help .