Even with people here "greening up" lawns with slow release urea, 21-0-0 or AG fertilizers, there is not much brown patch on zoysia. Difference is the lawns are normally mowed at 3/4" or less with a reel and there is not a lot of water. The people that do rotary mow zoysia have lots of undiagnosed decline of their zoysia. I can see a lot of dollar spot under conditions of really high humidity and high night time temperatures, especially on starved lawns that are mowed low.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738