Daisy, I've never heard of tomato vine borers, but I am very familiar with squash vine borers, the reason I can't grow squash. Good article. Now with the squash vine borer, the moth lays the eggs in the lower of the plant, which then hatched and burrows into the vine, I think. The article didn't mention if the tomato borer moth laid the eggs in the flower. I've read that squash vine borer moths can be prevented by using a light row cover during blooming. Now how you get fruit hasn't been explained to me, because it would seem that using a row cover would prevent bumblebees from pollinating the plant.
I think tomato vine borers must be relatively rare; never heard of them before. I did see the yellow dried vascular ring in this tomato stem pic.I do know that squash vines that have borers are very slimy and oozy, not dry.
