Ornamental and Turf Pesticide Applicators Practice Exam

What is a common disease of tall fescue in the southeast?

1. Spring dead spot

2. Large patch

3. Brown patch

4. Dollar spot

The correct answer is: Brown patch

Brown patch is a common disease of tall fescue, particularly in the southeastern United States. This fungal disease, caused by Rhizoctonia solani, typically thrives in warm, humid conditions, which are prevalent during the summer months in this region. Tall fescue grass is particularly susceptible to brown patch, making it a significant concern for turf managers. Infected areas often exhibit circular patches that start as small, brown spots and expand over time. The grass within these patches may turn yellow or brown and eventually die off if the disease is not managed effectively. Proper cultural practices, such as appropriate watering, fertilization, and mowing, can help reduce the incidence of brown patch. While the other diseases mentioned can affect turfgrasses, they are not as commonly associated with tall fescue in the southeast. For example, spring dead spot primarily affects warm-season grasses like Bermuda and zoysia, and large patch, while it can impact fescue, is more commonly linked to warm-season grasses as well. Dollar spot typically occurs in cooler conditions and is more prevalent during the spring and early summer. Therefore, brown patch is the disease most frequently encountered in tall fescue within this geographic context.