Thanks to all for your comments:
will try the electric wire next year.
blood meal trick,
But a bear, if a bear is getting my sweet corn then he can just have it, will not tangle with him, his mama might be lurking back in the woods.
I do grow (honey select) its a triple sweet brand sweet corn and have been told it's very good.
maybe that is why the varmintís are so after it.
thanks again for your input.
will keep the thrown out cd's I pick up along the road on my walks and save them to hang on next years corn crop.