Sevin spray or dust applied regularly on the stem emerging from the ground for a ways can prevent some of the SVB problem. Also Surround clay coated on leaves and stem will help.

I too wonder what the growers are doing...perhaps applying a restricted spray?

I've collected some ideas, the ones I'm using are picking eggs off the vines, I bought bt haven't yet used it and waiting for the rain to end to try. You can start your plant from seed in potash and tobacco, don't know if it works, but someone's grandmother always used it with hers and had no or little problem. You can use bug control attracting beneficials like robberfly, parasitic wasps, and good nematodes, inject bt in the stems of plants, wrap the base of plants with netting, place tin foil at the bottom to scare them away, plant them under corn because corn is said to hide them from the bug.

Pyrethrin from pyrethrin plants is used, painted daisies, shasta daisies, and a little pink looking daisy called a pyrethrin plant supply pyrethrin. I am going to try to plant them as companion plants around each vine. Radishes and nasturtiums are supposed to work planted near them, they didn't work for me, but they didn't flower until after the infestations and I'm just now planting radishes, so won't know. A yellow bowl of water put out, they are attracted to yellow, and they will dive in and drown.

The svb are so bold you can wait in your garden with a fly swatter beating them off, but that is time consuming. I got one with a flip flop, but I couldn't find it and probably only knocked it out. You can use row covers, try planting in containers with covers, but you will have to hand pollinate. Kaolin clay is what was mentioned above, insectidal soaps are another, lye soap made with meat grease helps to soften the shells of hard shell squash bug eventually killing them, so using that with pyrethrin oil is good. Neem oil is also used, not sure how.

There is a lily of some kind called sabadilla that kills them, they are not for sale anywhere. I accidentally bought a tree seed called sapodilla thinking it was the same, it does have insect repelling qualities, but what good is a tropical plant growing in a garden in the USA Tennessee? Not much without pulling the plant in and having to do too much special care.

Hope that helps! It's a battle every year with them. Catch them early on, buy varieties that are resistant, and you will be on your way! Maybe something will work for you. They don't attack my cucumbers anymore! There's hope.

There are more ideas, but those are the ones I know of.

Also, you can use flat mulch like paper instead of fluffy types like leaves, so the bugs can't hide or infest in them to overwinter.

They supposedly stop laying eggs in July, so do a fall planting instead of early on, and they like the fatter stemmed varieties, so maybe wrapping the stalks with pantyhose to keep them thinner might save them both ways, they can't bore in and they can't grow too thick giving the borer a nice comfy home.

These worms grow huge! I killed two in one stem and they were nearly a half inch thick and about 3 to 4 inches long. With a vining type of plant, you will have to chase the vine as it grows.

I may try only planting one plant of each, and wrapping them because rows of them will be too much, and why not grow one I can save than 10 I will never be able to keep up with and then infest my ground.

You can also do something called damaceaus earth? Don't think it's the same Kaolin clay, it will kill worms, but at the beginning of a growing season, put it down to kill off any infestation you have, the worms will come back hopefully. I may try this, my uncle does this every year and he has the most amazing garden with no problem with squash bugs of any type.

An article I read (link attached) on organic options mentioned that plastic mulches present a problem - giving shelter to the larvae. If you use plastic, you need to be sure to take it up at the end of the season to prevent that effect. Research the article cited concluded that the most effective mulch was newspaper covered with hay.

For what it's worth, it is currently difficult to find canned pumpkin. (I hang around in dog circles and it's a common additive to deal with digestive issues.) I don't know if SVB is the cause, but something has disrupted the commercial growers this past season.

Here is a link that might be useful: SVB Control

I think, but I'm not sure, that the canned pumpkin is actually C. moschata, and not C. pepo.

The C. moschata are resistant to squash vine borers. I have borers but haven't had any attack my moschata squash.