My tomato plants are all Better Boys that I grew from seed. The plants are watered by a sprinkler on a timer every morning at 6:30 unless rain is expected or fell the night b4. I've included one photo of the vines with the morning sun on them and one photo of a stricken tomato.

I understand about the cracking, green shoulders and cat facing (not shown in photos) but I have questions about the pest damage:

1. Can I cut off the top where the tomato was bitten and eat the rest?

2. What nasty thing is tunneling into my tomatoes?

3. Another tomato (no photo) showed a similar kind of invasion except that the damage looked more like an open tunnel - same location. Is that the same pest?

4. What can I do about it?

Thanks, All for your time and help.

Image link: