Leaf and Sheath Spot

What it looks like

Small tan spots with dark borders appear on zoysia leaves and sheaths. As it spreads, the lawn can take on a blighted, patchy look similar to other summer zoysia diseases, but this one stays in the leaf and sheath tissue rather than rotting the crown of the plant.

Often mistaken for: Brown patch or large patch

When it shows up in the Triangle

Shows up during warm, humid stretches of summer, the same time other zoysia diseases tend to flare up in the Triangle.

Where you’ll see it

Affects zoysiagrass lawns.

What you can do

• Keep thatch buildup in check with regular dethatching
• Avoid overwatering, especially in the evening
• Don't overdo fertilizer, especially nitrogen
• Improve airflow by trimming back overhanging branches or dense shrubs
• Mow at the proper height and avoid mowing wet grass