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

Fine fescue is the turfgrass type least likely to be affected by Brown Patch primarily due to its growth characteristics and environmental preferences. Fine fescue includes species such as creeping red fescue and chewings fescue, which are known for their tolerance to stress and ability to thrive in cooler, shaded conditions.

Brown Patch, caused by the fungus Rhizoctonia solani, typically occurs under conditions of high humidity, warm temperatures, and excessive nitrogen fertilization, which are more conducive to the growth of other turfgrasses like Kentucky bluegrass and perennial ryegrass. These grasses tend to be more susceptible to the disease, especially under stress situations.

Tall fescue, while somewhat resistant compared to more traditional turf types, can still exhibit symptoms of Brown Patch, especially when conditions are ideal for the pathogen. In contrast, fine fescue's ability to withstand dry and lean environments makes it less prone to the disease, highlighting its resilience in landscape situations where Brown Patch might thrive.