My bermuda lawn was inundated with ugly goosegrass weed for 5 years. I tried all kinds of post and pre-emergence products with no luck at all. Last March 15th I used Specticle G by the Bayer company and applied it again after aerating on May 1st. These pictures show the results. Not one weed of any kind survived. Best looking lawn I have had in 15 years!
But see Specticle Cautions