PCP, You have been good to share chufa herbicide with me in the past. I have always had great success except when I used crop oil instead of non-ionic surfactant. The time that I used crop oil I had pretty significant chufa damage. Could have been a coincidence, but I have never used crop oil again and have stellar results.
That's great info. Were you using 2-4Db or Milestone when you had damage?