Due to the extremely high density of zoysiagrass, weeds are less of a problem in zoysiagrass turf than in other turf stands. It may be necessary to control crabgrass or other annual grasses using a preemergence herbicide. Broad leaf weeds can be controlled using standard herbicides available in garden stores. Diseases are rarely a problem in zoysiagrass. If there is a disease problem it is usually due to the accumulation of thatch and overfertilization.
Chinch bugs are the most common insect problem in zoysiagrass.
Young chinch bugs are an orange-red color with a white band across the back. Chinch bugs injure the turf by sucking the sap from the leaves and stems, causing the turf to turn yellow and then reddish brown. Damage from chinch bugs is most often observed during July and August and is most severe during periods of hot, dry weather. Zoysiagrass Maintenance Calendar Month Operation . . April Annual grass control, using a preemergence herbicide, if necessary. . .