i was bidding a zoysia Lawn the other day and ran across this. The dead area started last summer and progressed. I am pretty certain it was cinch bugs by the looks of it, and his description of how it progresses. But wondering about the stunted/club roots? Would they be caused by a pre emergent earlier in spring, or a herbicide applied during or after cinch bug damage occurred? More interested in the club/stunted roots than the large dead area. I have seen it before in lawns with no apparent pests but obvious fungal issues. Wondering if the herbicide damage is expressed more when other factors are at play.