What characterizes summer patch disease in turfgrass?

Summer patch disease is characterized by small, dry patches in the turfgrass. This disease is caused by a fungal pathogen that affects the grass during hot and humid weather conditions, particularly when the turf is stressed due to drought or inadequate nutrients. The patches typically start small and may expand over time, but their distinctive dry appearance sets them apart from other turfgrass diseases, which might manifest with wet or muddy conditions.

The presence of small, dry patches signifies the die-off of the grass in localized areas due to the pathogen's effect on the root system and water uptake. Understanding this characteristic is essential for effective identification and management of summer patch disease in order to apply appropriate cultural practices or fungicides to mitigate its impact on turf health.