Doubling Ploidy with Trifluralin?

I have only used colchicine with OK results. With trifluralin could you recommend a protocol for its use? Is it more effective than col., is it unsafe or as dangerous? What percentage of conversions do you get? With colchicine I was getting about 1% on Iris pseudacorus alba.

Dave Zlesak has a published paper on this topic. !3 papers have cited his work. They are: