As best I can determine, plastic mulches are the worst, providing places for the bugs to hide.
I've only seen tomatoes growing over plastic mulches here, in commercial fields.

One solution I read is to plow under organic mulch materials and plant cover crops in off-season.

I use a lot of pine straw mulch, that being what grows here. It seems to have a natural repellant quality.
Where I pile pine straw for future use, there are no insects in or under the straw when I pick it up.

Last fall, I hauled peanut hay out of the field where it is left to decompose until it is plowed under.
The leaves quickly dry up and disappear and what is left is long coarse stems.
It is dense enough to smother weeds and grass, but to my surprise, a dahlia grew straight up through a pile about 8 inches deep.
I haven't seen insects or slugs underneath this mulch, either.
I try not to think about what half-life the pesticides sprayed on that field may have had.

Nell

Here is a link that might be useful: Organic Controls of Squash Borers

That is one of the articles I read, Nell. You are correct, according to various items I read, regarding the plastic mulch being the worst and straw being a good mulch. I am so glad that I put off mulching the produce garden until the plants are better established. The mulch I already purchased is the wrong kind.
Lorna