I used to use Sevin dust for bugs when I had to, never liked using chemicals at all if i could keep from it, but they've stopped carrying Sevin. The guy at the feed store recommended something similar named Snipper insect dust. I used some of it on some squash bugs and it really did the trick, but i really haven't studied the label or searched the web for info about this stuff.
Also, for the heat I got real lucky several years ago, having a neighbor who used to raise some big ostrich like birds, he had em in big dog kennel type pens, and had covers over the top, sized of big tarps, but made to let some sun and air through, he gave me one to put over the tomatoes, does lots of good in the extreme heat. Anything over 95 I put it up, but take it down any chance of rain. I'd use those lil green tarps with tent poles tied down to stakes if I had to tho
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