Large Patch on Zoysia

Every late April to early May, large patch on zoysia becomes active.  The link in the previous sentence discusses home lawns but does a good job in explaining the disease.  We completed a full course application on all fairways, tees and green surrounds that consists of zoysia in the fall to reduce the effects of the disease when it becomes more active in the spring.  We then spot treat the areas where the disease develops in the spring with a curative application of fungicide.  Very rarely does this disease completely kill an area where new sod is required.

Our most active area is the drive landing area on #10 fairway.

The picture below is of an active patch on #10 fairway.  Usually, the margins around the outside of the disease has a tendency to be slightly orange in color which is the most active area of the disease.  The turf can become slightly matted in more severe situations.