Large patch image from &ldquo,Issues with Zoysiagrass Lawns,&rdquo, Missouri Environment and Garden. (April 30, 2012)
Fungal Diseases
Zoysia grass is susceptible to a number of fungal diseases. The most common is large brown patch, which begins as small circular patches of brown, lifeless grass that can enlarge and join together. Most fungal diseases exhibit distinctive patterns in the lawn or spots (lesions) on the leaf blades that aid in their identification. A very close examination of dying (not dead!) leaf blades is needed to verify which, if any, disease is present.
Diseases occur when very specific environmental conditions of temperature and moisture are present. Many diseases run their course before a homeowner can act, making the application of a fungicide of little or no value. Changes in environmental conditions or management practices can also halt a disease.
Lookalikes: Drought, chinch bugs, hunting billbugs, and nearly all the problems listed in this guide
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