it isn't listed as a pest it controls. to be honest I don't see how it would stop the female laying her eggs. she doesn't dig her whole body into the soil so it would block her breathing tubes.

Unusual for them to be so damaging out in the open garden. They usually only eat a smaller proportion of a plants roots than they do in the confines of a pot.
Very difficult to make any suggestions. You could try putting a circle of plastic (rather like the things used to stop Cabbage root fly) round the stem of single stem plants. That stops her from laying eggs as they need to be deposited on the soil near to a plant stem.
For multi-stem plants you might need to mulch with gravel/grit to a depth of at least an inch. Again if she cannot reach the soil then the eggs are not laid.
Very difficult.

I have problems with the pest and have used the soak treatment offered by Bug Clear Ultra. I think that it did make a difference but it is hard to be definite about this as it is applied when the larvae are evolving and the adults are munching their way through your plant. However, I have used it for 2 years now and do believe that it at the very least has slowed down the spread if not halted it.

It is a pan to apply in the garden as the instructions are not written for this. However, you can work out what measures to use from the label instructions.

I found this online - I don't eat radishes but they are most effective of all the plants below. I plant them around my butternut squash - no bug damage at all.

Two of the most common plants that repel squash bugs are nasturtiums and white icicle radishes. ... Plant them throughout your squash beds for the best results. Other plants such as oregano, marigold, calendula and dill can also provide some protection and deter squash bugs in your garden.

sadly there doesn't appear to be a companion plant to ward off vine weevil. wish that there were.

Well...as I just said, this seems to work for me. That's why I'm sitting here typing this!! We call them vine borers but it's the same bug. The internet is rife with supporting information. Certain squash varieties seem to attract more than others. I only grow butternut squash.

The squash vine borer ( Melittia cucurbitae] is a different species to our Vine weevil [Otiorhynchus sulcatus] Paul.
yours can fly and has male and female individuals where ours cant fly and there haven't been any males found.

So whilst you are correct for your pest it doesn't apply to ours sadly. like I said if only we had a companion plant to ward it off.

I'll bet you never tried butternut squash!

you'd have lost your money ;o) My youngest girl loves it and she has cooked it many times over the last 2 yrs. She was introduced to it in her 2nd year at uni and it is one of her staples. she has asked if she can grow some next year in the home garden. even though she may be anywhere in the country as she will hopefully have finished uni and have a job.

If you get the chance, try making Butternut Squash Soup (add an apple to the blender for a hint of sweetness). It's iconic! It's been a staple in my house forever, usually associated with holiday festivities. Maybe spaghetti squash next season?

So that's the answer Jimmy - Butternut Squash!

There are a lot better tasting Squash than the ubiquitous Butternut. We like Crown Prince for one,Uchiki Kuri and Onion Squash as well. And none of them have any effect whatsoever on Vine weevils. Nor do radishes or nasturtiums or as Seaburngirl says any plant. I have tried every know method of dealing with Vine weevils. Nothing much works, except perhaps the new treatment of a fungus which when added to compost, attacks and kills the grubs. Very expensive and at present only available to professionals.

I haven't heard of vine weevils except for here so I must be doing something right. Owd - "ubiquitous"? Gee, I wonder why? Crop rotation is another option against those dreaded bugs. I'll pass on the Crown Prince and those other ones thank you, bitter!

Bathgate, unfortunately we do not have such stringent laws concerning the importation of plants that you have. At one time the dreaded vine weevil and the New Zealand flat worm were unheard of in the UK.

That's true!

Sad to say that vine weevil is in the USA and has been since the early 1900's according to some internet sources. Probably imported in infected plant materials.
It is a native to northern Europe but is doing better 'under cultivation' due to the plants we grow and the soft peaty composts that are more favourable for laying eggs in.

I'm glad they haven't found my garden just yet. So butternut squash it is!