Someone reported on page 23 of the 24 page squash bug thread
on Idigmygarden that a mix of soap, neem oil, and cedar oil
seem to repress their numbers pretty well without killing
them outright.
http://www.idigmygarden.com/forums/s...?t=306&page=23
The next best course seemed to be growing resistant varieties,
several of which are mentioned more than once in the thread.
People reported variable results with growing the squash among
nasturtiums and specific kinds of radish.
A document elsewhere suggested not to overdo the cedar oil,
as it can kill plants in too strong a concentration. (If you are
searching for it, it might be called "cedarwood oil" instead.
If handling it, I would wear gloves, as cedarwood oil has
toxic compounds in it that can be absorbed through the skin.)