Brown Strips in St. Augustine Grass

Question

Last year about this time I noticed brown areas in my yard. I treated it for mole crickets, planted new grass where some bugs had destroyed it, and that area seems to be doing fine now. I did treat the whole yard last year. I am noticing now it is reappearing in a different area of my yard. It appears as if it were tunneled and the grass turns brown. If you pull the brown grass, it comes up without roots. I tried the soapy water test and nothing came up except normal garden worms. What could this be? I need to catch it before it spreads.

Answer 1

It could be lawn grubs or a fungus of some kind. These articles should help: https://www.gardeningknowhow.com/plant-problems/pests/lawn-grubs-how-to-get-rid-of-grub-worms.htm, https://www.gardeningknowhow.com/lawn-care/lgen/grass-fungus.htm