Why Is My Grass Brown?

Question

There is a patch of grass that is turning brown. I have dug up soil in 3 different areas and there is no sign of grubs. What could be another cause of the damage? Also, I do have my lawn treated by a professional weed control service, but they do not treat for grubs.

Answer 1

It could be a fungus. This article has information on the most common kinds of lawn fungus:
https://www.gardeningknowhow.com/lawn-care/lgen/grass-fungus.htm