How often do you water and for how long? How high/low do you mow? The weeds can be handled by something like Spectracide with Atrazine. But I would wait until the grass returns. I have gotten excellent results for fungal disease using ordinary corn meal. It is an organic approach that the experts at Texas A&M swear up and down does not work, but it has worked for me every year since 2002. It is a complete cure in 3 weeks. I am suggesting you try that because corn meal doubles as an organic fertilizer. Your spots don't look that much like a disease, but it could be. If you did not have the really healthy stand of grass right by the sidewalk, it would look more like disease. I would hit it with corn meal at 20 pounds per 1,000 square feet now and again in 3 weeks. If you don't see new grass coming up in 4 weeks, then get a commercial fungicide that works in your heat/precipitation zone - read the label closely to see how to apply and when. Corn meal has no restrictions on how or when. Then once you get the grass growing, zap the dollar weed (I assume dichondra or some other easy weed) and let it grow. And if you have not already raised your mower to the highest setting, do that yesterday.

Oh my goodness, Texas-Weed, it's a full-time job correcting all your mistakes. Cutting zoysia once a week is NOT infrequent mowing that will lead to excessive thatch. My zoysia has never been cut more often than once a week, and it's never had a thatch problem. But don't rely on my anecdote. Let's look at what Alabama A&M and Auburn have to say about cutting frequency and height. But first before we go to Auburn and Alabama, let's remember from the previous posts in this thread that 2 University of Arkansas professors and 3 University of Florida professors allow for a maximum zoysia cutting height of 2.5 inches, which is significantly higher than your maximum of 1.5 inches, Texas-Weed. Now onto Auburn University's and the University of Alabama A&M's advice for mowing heights and mowing frequencies of various Zoysia grasses. The first thing shown on each line below is the name of the Zoysia species or of the specific cultivar/variety within the species. The second thing shown is the Minimum Mowing Height in inches for that grass. The third thing shown is the Optimum Mowing Height in inches. The fourth thing is the Maximum Mowing Height in inches. The fifth and last thing shown is the Mowing Frequency in days (it's shown in parentheses). Zoysia japonica, 2 , 2 , 3 , (every 7-10 days) Meyer Zoysia, 1 , 1.5 , 2 , (every 10-14 days) Belair Zoysia, 1 , 1.5 , 2 , (every 7-10 days) El Toro Zoysia, 1 , 1.5 , 2 , (every 7-10 days) The above are all cultivars within the Zoysia japonica species (Palisades is also within this japonica species). This species tends to have wider blades and lower shoot density than the other two main zoysia species, which are Zoysia matrella and Zoysia tenuifolia. The tenuifolia species is not common in the U.S. A little bit of it is used as ground cover in parts of Southern California. Alabama A&M and Auburn also list mowing heights and frequencies for some cultivars in the Zoysia matrella species. These thinner bladed grasses have a maximum mowing height of 1 inch, tend to have denser shoot density than the cultivars within japonica, and tend not to have the cold hardiness of the japonica's, so they're not found around here in the northern half of the Transition Zone. Yes, that document is "Under Review," (because universities like to catch mistakes, Texas-Weed), but I saw similar mowing frequency numbers for zoysia printed on the web somewhere else a couple months ago--I don't recall where right now. By the way, I read in a couple textbooks I got from Amazon that a little thatch is helpful to grass. It is *excessive* thatch that is not.

Why dont you think it's Bermuda? Tough to tell from the pic

I will need to double-check the sprinkler system. I had it serviced when i moved in but that was really to just make sure all the heads were working and i'm not entirely sure all areas are being equally covered. I currently water every 7 days but have watering restrictions where i can only water on wednesday / saturday every week. In this scenario perhaps I should water on my allowed days, then take one off? That way i am watering 3x every 2 weeks - pretty close to the 5 day schedule.