I'm looking for suggestions as to what might be chewing holes in my
tomatoes.

I'm finding a great deal of tomatoes (green or otherwise) with a single
hole eaten in them. I cut them open and there aren't any worms or other
critters inside and I don't see any evindence of slugs (ie trails). I
treat them every two weeks with Bt, just in case but it's still
persistent. I wouldn't be so upset if one or two tomatoes were eaten but
it seems almost half of them have this 1/4 wide inch hole bored in them,
to a depth of about the same and mostly it's only a single hole.

I visually scoured the plants ( I only have six) to pick out any culprits
and all I found were a couple of stink bugs, one slug on the ground and no
sign of horn worms.

Any ideas?

Thanks.

--
The Good Friar