just hoping for a response? I've never had any of these problems before, but I've never grown piriform either.

On the last picture, the plant is aborting those leaves. Probably you did not water it soon enough. So I would just nip them.

The one in the first picture, not evident as I cannot see the whole seedling. But either way, regardless of the cause that leave is out of commission. Maybe it is some sort of environmental damage caused it. Again , nip it as it has NO CHANCE to recover.

Sey

Did it go outside? Hard to tell in the blurry pic, but could be sunscald.

I was too careful not to water and caused quite a bit of drying out damage this year, with dying lower leaves like your second pic. Next year I will water the tomatoes indoors more. They are thirstier than other nightshades and do not tolerate the soil drying out like peppers do.

They haven't been outside. I am a chronic overwaterer and have been trying to do better. Clearly I need more practice. But I can't help but think that those stinkbugs are spreading disease.