What disease is likely indicated by small, straw-colored patches in a Zoysia grass lawn?

The presence of small, straw-colored patches in a Zoysia grass lawn is typically associated with Dollar Spot disease. This disease is caused by the fungus Sclerotinia homeocarpa and is characterized by the appearance of circular, light tan to straw-colored lesions, which can lead to thinning of the grass in affected areas. The small size of the patches and their color make them distinct from other diseases.

In contrast, Brown Patch is known for creating larger, circular brown or dark brown patches, especially in conditions of high humidity and temperature. Pythium is associated with wet areas and tends to create more irregular patches with a dark, greasy appearance, while Leaf Spot diseases usually result in small lesions on the leaves rather than entire patches of affected turf. Therefore, the characteristics of the patches as described strongly align with Dollar Spot, making it the correct identification for this condition in Zoysia grass.