Q.Empire Zoysia grass has Grubs or Fungus
My Empire Zoysia grass/lawn has grubs or fungus. There are brown spots (grass looks dead) on my lawn. These areas can be very easily pulled up like a carpet.
I would recommend digging up a small section of your lawn and confirming the presence of grubs. More information on how to do this and information on grub control can be found here:
https://www.gardeningknowhow.com/plant-problems/pests/insects/get-rid-of-grub-worms.htm
If it's not grubs, it could be a zoysia disease such as brown patch, leaf spot or rust, all of which are explained in the following article:
https://www.gardeningknowhow.com/lawn-care/specific/zoysia/zoysia-diseases-tips-for-dealing-with-zoysia-grass-problems.htm