Worm in tomato stem
 

Noticed last week that one of my Momataro plants wasn't looking too good.
Well it looked a little worse today so I pulled it up. I suspected some sort of blight or wilt and wanted it away from my other plants.
When I pulled it I noticed a brown section of stem above the soil line and the stem was very weak there.
I broke the stem open and could see where a worm had been but didn't find the worm. I hope it doesn't find it's way to any of my other plants.
I hated to lose a plant loaded with tomatoes but I've got 51 more.
Has anyone else had this problem and what type of worm would this be?
I spray with eight maybe 3 or 4 times a season but use fungicide weekly. Not sure any type of spray would be very effective on something inside the stem.
Thanks for any info.

I had the same problem in one of my plants this year. It was a big beef that had gotten damaged but had grown back and was doing well. All of a sudden it looked wilted and I let it go for a couple of days until I decided to pull it out I cut the stem and there was no discoloration inside. I also placed it in a glass of water and looked for streaming of bacteria to which would indicate bacterial wilt and there was none. Then I noticed the brown discoloration right at the soil line. I did not see any insects but it looked to me almost like the stem was rotting at that point. I assumed that it had been damaged and insects were eating it or that fungus had moved in to a damaged spot.

I would have thought some sort of blight or wilt but could plainly see the worm sign inside the stem when I broke it open.