Managing Brown Patch in a Young Fescue Lawn

Brown patch (Rhizoctonia) in fescue is exacerbated by excess nitrogen, frequent watering, and low mowing.

Cultural Controls

• Mow high (3–3.5″); bag clippings during outbreaks.
• Water deeply once weekly; never evenings.
• Fertilize only in fall (Sept) and spring (Mar); zero summer nitrogen.
• Maintain pH 6.5; avoid acidifying fertilizers.

Fungicide Option

• Bayleton (triadimefon) or Eagle (myclobutanil) – 1–2 applications curative.
• Treat infected area plus 2-ft buffer.
• Rotate chemistries if recurring annually.

Organic corn meal gluten has limited efficacy; integrated management works best.