Zuch vines are hollow. If you had a borer you might experience collapse of the entire plant. And you might find a worm at the very base of the plant. I think they can be hard to find.

Shanonoh, vine borers can be many places in the plant, even up one of the stalks. To be totally sure, you may want to split open all of it. As you may know, you should also see the sand-like residue they leave behind. I hate to say it, but when vine borers got my squash this year, the plants died off slowly one at a time, as the borer grew larger and moved itself up the plant. I really hope that is not happening with yours. I swear I have PTSD from cutting open the plants and seeing those little wriggling worms inside!

Oh, crap, I didn't know they could die slowly -- mine went fast last year... I really don't want to find them... but saw adult borers several times, so pretty sure I have them!!

imo a lot of damage attributed to borers in my area (virginia) is actually from squash bugs- they inject a poison (bacteria actually) into the plant each time they eat and eventually it reaches critical mass and kills it "all at once". i have examined hundreds if not thousands of dead squash plants over the years and have yet to find my first borer...

You don't need to find a borer to know you have them. The presence of a yellowish wet sawdust-looking frass is sufficient - usually near the base of the vine.

In my area of Virginia, there are SVB everywhere. I joined a local gardening meetup group and members state that it's big issue here every year. I've yet to see a squash bug in my garden but I found the tell-tale 'saw dust' near the base of the vine on both my zucchini and pumpkins. I injected with BT and they seem like they *may* bounce back....time will tell.

I'm in northern Virginia. I found the dreaded SVB frass on two of my three winter squash vines, but I think I caught it early enough. They were showing no signs of wilting or anything else. I cut out the borer with e knife and covered the damaged stem with soil, and they look great over a week later, so I am optimistic.

SVB half destroyed my zuchinni. It looked like it was going to rebound but I don't have any flowers yet. I was able to find 2 worms and I sprayed inside the stems. I haven't covered it with soil though. Maybe I'll try that.

Next year, BT!

Thanks for all the follow-ups. I did not have squash vine borers, but I had squash bugs aplenty. ARG

I just pulled all my summer squash plants, because they have essentially stopped producing. I may have gotten one or two more fruit out of each but its time to clear the area for Fall crops.