I've done a lot of experimenting of my own with squash bugs and have not yet found a real solution short of daily proactive attention to the plants.
This year I'm going to do everything I can do attract tachinid wasps to my garden. They are a chief predator of squash bugs and I think the idea has some promise.
They'll be attracted by the other plants I'm going to grow around my squash: parsley, tansy, crimson thyme, pennyroyal, lemon balm, and golden marguerite. Buckwheat would help, too, but we can't grow that due to our particular soil conditions here in East Texas.
