I use herbicides as a last resort. I reached that point this year with our massive poison oak infestation. It's bad everywhere up here this year, not just my property.
I've been using Triclopyr (Garlon 4) on poison oak this year, based on recommendations from UC Davis Ag. It's broadleaf specific not broad spectum like Roundup. Reading the docs it's somewhat less toxic than Roundup. And when applied properly it's a lot more effective on poison oak than Roundup. Even better- a 20% solution in diesel, applied to a short section of stem, is especially effective and ends up using much less herbicide than foliar spray. It also works well in PO whose leaves are too high up to reach. However Triclopyr is only effective when the PO is growing and growing season's over now.
I follow Jeff's safety protocol when spraying.
I wonder if Glyphosphate from other sources has fewer toxic additions than Roundup?