Ya mean somethin that looks like this.
This is probably more of a fert forum Q but here it goes.
I have seen it before. Seriously it is usually caused by low N. Do a search here. Fert and water really helped mine. It is a widespread problem this year for reasons unknown to me. I had it in a stand of new planted lawn and the established lawn next to it had none. Hit it with N, Ferromec and watered it and it turned around. Fungicides are relatively useless as once it is established its too late for the fungicide. Good Luck.
This is probably more of a fert forum Q but here it goes.
I have seen it before. Seriously it is usually caused by low N. Do a search here. Fert and water really helped mine. It is a widespread problem this year for reasons unknown to me. I had it in a stand of new planted lawn and the established lawn next to it had none. Hit it with N, Ferromec and watered it and it turned around. Fungicides are relatively useless as once it is established its too late for the fungicide. Good Luck.