the weed looks like curly dock. should not realy aerate or do lawn renovations in spring..u will battle weeds all season if your not on top of things as u have found out thus far.good weed control is speedzone.(1.3 oz. per gallon/1K) i beleive u can use if air temp is up into the low 90"s.i myself specialize in lawn reno's. so i know alot of do's and don'ts. u could have used siduron in spring to fert with. has pre emergant for grassy weds.