I firmly believe that strong salt and / or vinegar solutions used as weedkillers are really, really bad for soil health. Personally I keep on top of driveway weeds (pea shingle - perfect seed bed...) by hoeing but, usually, I reach a certain point in the year when I resort to a single application of glyphosate. (Haven't had to do that this year because it's been so dry even weeds have failed to germinate). I have not noticed any reduction at all in bug life with this treatment.If you really do not want to use glyphosate there is now a 'greener' version of Roundup available from garden centres which contains an alternative 'greener' chemical. Roundup was one of the commercial names for glyphosate products but, as I said, the same company now make the 2 versions of weedkiller - one with glyphosate and one without. I have no idea how effective the new version is.