In my garden patch (modest size -- I'll probably finish the year with about 500# of stuff harvested) I finally controlled them by aggressively search for egg masses -- a couple hours a week from July 1 through August 15 did the trick. I'm still harvesting some summer squash 2 months after the plants put out their first ones! Never got past mid-August since I moved here before.
In Connecticut, Squash Bugs are resistant to Sevin. The other chemicals like Rotenone are only effective on the nymphs, and unfortunately are also bad for the bees -- since the eggs are being laid when the plants are flowering, it's pretty impossible to properly spray for the nymphs often enough to be effective and not seriously impact your pollinators.
As I understand it, commercial growers are less impacted since they have bigger fields then home gardeners. Since the bugs harbor over the winter in the woodline, in commercial fields there is relatively few squash bugs over wintering to the size of the patch. Only squash bugs that have over-wintered lay eggs. I think they have stronger pesticides they can use, too.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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