Which turfgrass type is least likely to be affected by Brown Patch?

Fine fescue is the least likely turfgrass type to be affected by Brown Patch due to its inherent characteristics and growth habits. Brown Patch, caused by the fungus Rhizoctonia solani, thrives in warm, humid conditions typically associated with certain cool-season grasses.

Fine fescue, which includes species like creeping red fescue, chewings fescue, and hard fescue, generally performs well in cooler and drier environments compared to other cool-season grasses. Its growth is more suited for low-nitrogen applications and does not require the same high moisture levels that facilitate the development of Brown Patch. Furthermore, fine fescue has developed a more robust set of genetic traits that offer better resistance to various diseases, including fungal infections.

In contrast, tall fescue, Kentucky bluegrass, and perennial ryegrass are more susceptible to Brown Patch due to their growth habits and environmental requirements that can create optimal conditions for the disease to flourish. These other grass types often require more water and thrive under conditions that are conducive to the spread of the fungus. Therefore, the resilient attributes of fine fescue make it the best option in terms of resistance to Brown Patch among the choices presented.