I was faced with ugly brown patches on my lawn..was told it was the dreaded grubs which help feed the mole population or leads to AAAAH Japanese beetle infestation.
Mom said that I should water the lawn with a glycerin solution. I'm not a scientist so
I checked ingredients on things I do have at home...ta-da...baby shampoo.
Use a spray bottle attachment to your water hose. Dump a 12 oz. bottle of baby shampoo in it. Water till you can't smell the shampoo. It really works. The kids like doing it because of the smell and possibility of "bubbles."