Which symptom is associated with dollar spot on turf?

Which symptom is associated with dollar spot on turf?

• A. Galled, swollen roots.
• B. Tiny tan to straw-colored spots with a boat-shaped lesion and a yellow halo.
• C. Large circular patches with a ring of unhealthy tissue at the edge.
• D. Yellowing blades with dark insects visible.

Answer: (B)

Dollar spot presents as small tan to straw-colored spots on turf blades, and the telltale sign is a boat-shaped lesion on the leaf with a yellow halo around it. This boat-shaped pattern arises as the infection grows along the leaf blade and toning occurs at the edges, while the yellow halo indicates surrounding tissue is stressed or chlorotic from the pathogen’s activity. This combination of a tiny tan spot with a distinct boat shape and a yellow halo is the characteristic symptom that differentiates dollar spot from other turf issues, such as larger ring patches, root problems, or insect damage. Dollar spot tends to appear under warm, humid conditions with leaf wetness, and effective management focuses on reducing leaf wetness, avoiding excess nitrogen, and using appropriate fungicides if needed.

Dollar spot presents as small tan to straw-colored spots on turf blades, and the telltale sign is a boat-shaped lesion on the leaf with a yellow halo around it. This boat-shaped pattern arises as the infection grows along the leaf blade and toning occurs at the edges, while the yellow halo indicates surrounding tissue is stressed or chlorotic from the pathogen’s activity. This combination of a tiny tan spot with a distinct boat shape and a yellow halo is the characteristic symptom that differentiates dollar spot from other turf issues, such as larger ring patches, root problems, or insect damage. Dollar spot tends to appear under warm, humid conditions with leaf wetness, and effective management focuses on reducing leaf wetness, avoiding excess nitrogen, and using appropriate fungicides if needed.