How to stop the Japanese beetles that cause the problem
If you have brown patches in your lawn, I expect the cause is Japanese beetle grubs eating the roots of the grasses. Japanese beetles are out in full force, feasting on roses, linden trees and other favorite ornamentals, as well as puncturing and eating peaches, raspberries, blackberries and plums. Soon those same beetles will be landing on your lawn and depositing eggs in the earth. When those eggs hatch, hungry young larvae will begin feeding until fall when the soil cools and they burrow deeper in to survive the winter.