I have not used a pre emergent liquid on my lawn, just because of the fact of it being a larger yard and I have a family members pull along spreader for my garden tractor. So its easier for me to spread than spray. I did look into john deere and they have 50lbs of Lesco Stonewall for 24 bucks, which is alot cheaper than Gallery.
Can you please explain what you mean by detrimental to the stolon and root growth using a pre emerg?
And a pre emergent prevents the seeds from weeds and other plants from germinating.