Three days ago all of my zucchini plants looked fabulous. Then one day, one looked a little wilty. I thought perhaps it was dry so I gave it some water. That evening when it cooled down it perked back up. The next day it looked wilty-er. I checked. It wasn't dry. The ones beside it are totally fine. I carefully inspected it. No squash bugs, no fungus, no evidence of squash borers. Still, it looked like it could be squash borers. SO, last night I went out in the dark and shown a flashlight through every single stem. If there's a borer in there, you'll see them and if you get on it early enough you can stab them with a toothpick and kill them, or else slit the stem and pluck them out before they kill the plant. Well I saw nothing. Every stem glowed hollow. There's no bore hole in the stalk, no plantdust at the base to indicate where one went in. Also the plant looked fine again last night. This is how it looks now. This is its next door neighbor. Here's a row shot. Any ideas other than borers, squash bugs, and being too dry? At first I thought maybe that plant just didn't like the heat but it's gotten progressively worse every day. The way it looks now I doubt it'll survive the week.