Dollar spot can occur on all turfgrass species.

Dollar spot can occur on all turfgrass species.

• A. True
• B. False
• C. Only on warm-season grasses
• D. Only on cool-season grasses

Answer: (A)

Dollar spot has a broad host range across turfgrasses, meaning the pathogen that causes it can infect both warm-season and cool-season species under favorable conditions. This wide susceptibility is why the statement is true: dollar spot is not limited to one group of grasses but can occur on virtually all turfgrass species when leaves stay wet and growth is lush. In practice, you’ll see small, round, tan spots that can merge into larger patches under humidity and moderate temperatures. Management focuses on reducing leaf wetness and excessive growth through proper irrigation timing, good air movement, correct mowing and fertility, and using fungicides if needed. The other options would incorrectly limit which grasses can be affected, which isn’t the case for dollar spot.

Dollar spot has a broad host range across turfgrasses, meaning the pathogen that causes it can infect both warm-season and cool-season species under favorable conditions. This wide susceptibility is why the statement is true: dollar spot is not limited to one group of grasses but can occur on virtually all turfgrass species when leaves stay wet and growth is lush. In practice, you’ll see small, round, tan spots that can merge into larger patches under humidity and moderate temperatures. Management focuses on reducing leaf wetness and excessive growth through proper irrigation timing, good air movement, correct mowing and fertility, and using fungicides if needed. The other options would incorrectly limit which grasses can be affected, which isn’t the case for dollar spot.