Also came across a site that states that in some countries Roundup has a surfactant, a wetter agent added. In other countries, like Britain, it's illegal because it's believed a wetter increases toxicity. If legal, add 1% soft soap to the final spray, the mixed batch. Spraying in autumn is meant to be more effective because the Ivy is transporting sugars to the roots for winter so the Glyphosate gets transported there. Mind you, it still states that it may take up to two years with about 4/6 applications to kill it. It's one persistent bugger!
