I'm not having aphids (although ladybirds keep landing on my nose so I am thinking there are aphids but they are eaten before I see them), but my plants have been sulking since this ridiculous weather started--we've been in the high 90's with indexes around 110 with humidity. Not only wilting, but the tops have been curling and the topmost branches look deformed.

I don't blame them one bit, I am sulking too. Only, I have the option to sit in the a/c in front of an open fridge door.

I'm not in the midwest but it's been hot as hell here too for the past week. Some of my plants had irreversible wilt at their tops, like i've never seen before. Just dried up dead. I was worried it was a disease but i had them covered the next day and all the covered ones are fine (i did miss a couple :( ). That is when i figured it had to have something to do with the new growth not having been "hardened off" or used to this kind of baking.

On the aphid front, i've had to resort to insecticide. They are really bad and i waited long enough for ladybugs to appear. Last year i didn't see a single aphid on my toms and the place was crawling with ladybugs. I don't know what gives.

I had two toms of my four do the top wilt thing today. Both were fine by evening. I think they are just conserving energy during the hot part of the day. Of course, that was after my initial panic attack!