Nope and nope. Cecil, of course, got it right again.
I did notice he neglected to mention herbicides in the column though.
I was working as a pipe fitter for an irrigation company on Kauai right after hurricane Iniki. Part of the project involved clearing away brush so we could install lines and re-plant with grass. We were forbidden to use RoundUp (a common herbicide) on many of the plants because they were not specified on the data sheet. Seems the Monsanto company hadn’t gotten around to testing it on tropical flora. We were forced to resort to the “much safer” method of killing them with a roofers torch. When we were allowed to use it, exact measurements, right down to how much soap we added, were insisted on by our field supervisors. I got the feeling that there had been some past event behind their caution.