Hi Vador!
Welcome! The best companion for squash to deter squash bugs and bore worms that comes to mind is nasturtium. I plan on growing it with my cucurbits this year for sure, and marigolds are good.
Here's an article about some beneficial insects that you might like to read :
http://garden.org/articles/vie...
Tachinid flies are great beneficials that are predators of many insects including the squash bugs.
Squash bugs were really bad last year, around here also. It must have been the extra heat and drought. A soapy blast will also kill the squash bugs. I sprayed for weeks! You have to spray them directly on the bug to kill it. I used a castle lavender soap but think any will do the job. The appear early in the summer so it's good to just do an inspection, including looking under the leaves where they lay their eggs. You'll see them, orangish-brown small eggs grouped in a "V" shape is typical.
Last year was the only year I didin't plant the garlic and squash close together, so I'm also wondering if the garlic was a deterent. Radishes are another good companion near squash. Tarragon is disliked by many pests and is always good to have in the garden, most plants get along with it fine and the ladybugs are attracted to tarragon.
