What disease causes small, white mushrooms to appear on grass blades?

The correct answer is White patch, which is a disease that typically manifests as small, white mushrooms or fungal fruiting bodies on grass blades. This condition often arises in specific environmental circumstances, such as high humidity and prolonged moisture on the grass. The fungi responsible for White patch thrive under these conditions, leading to the production of the characteristic white mushrooms, indicating an underlying issue with the lawn that may require attention.

Other diseases may involve discoloration or damage to the grass but do not produce the same visual symptom of small white mushrooms. Understanding the specific appearance of White patch helps in identifying the problem early, allowing for appropriate management strategies to be implemented to restore the health of the lawn.