I see what your saying absolutely I am just speaking from experiences I have had treating big mats of it last couple seasons at this time of year. The lawns where really able to get a jump on it come spring time. Lets face it one app now is not going to completly eradicate it thats why to me I am not worried about bare spots at all. Also One thing that really suprised me was how much grass was actually under the mats you just did not realize was there. Not saying anybodys wrong I just dont use the possibility of bare spots as a detterent from spraying when I can give the turf a fighting chance.