What is the reason for new dead/dying spots in long established zoysia lawn? The zoysia has been there for at least 20 years but now is developing patches that are not growing. There is still some ground cover but definitely not healthy. My first thought was grubs but didn't know if they impacted zoysia in the same way as other grasses. Also, what would cause them to come in after all these years? We have had a hotter and drier summer than usual, but I water often and zoysia usually loves the hot sun. Will standard treatments work on zoysia?
Dead/Dying Spots in Long Established Zoysia Lawn
Certified GKH Gardening Expert
It could be grubs and it also could be a fungus. Zoysia is normally pretty resistant to both, but if it has had a hard season (which may be possible with the weather), it would have been more susceptible to these problems.
These articles will help you identify which it is and how to treat it: