Do you not irrigate your lawn? Water, fertilize, and more Water. bjr
Everything but irrigate. With 3 acres of lot rain is my only hope for water.
I try to keep it mowed tall once the "dry season" comes in.. but even then if we get a month without significant rain our lawn (and most others around here) go to poop, and this quack grass starts up (clover too, but that's easy enough to take care of with 2-4-d, as long as the grass is healthy).
I'm not the only one with this issue. I'll have to try harder next year I guess... lol. Usually in the fall we get cooler temps and lots of rain and we all get our "spring grass" back again which is nice.