What's a "nice slow motion pitch pole"??? All of my pitch poles were quick, violent "How did I suddenly get in the water?" affairs!!!! Anyway, I've heard a mild mix of Oxalic Acid works well, I've never tried it, my preference would be mild soap and water, scrubbed on the lawn. If that didn't do it I'd step up and try Oxygen bleach, as it worked VERY well when I soaked my sheets after way to many years under an almond tree.