Red Thread in Long Island Lawn: Resistant Varieties & Fungicide Options

Red thread diagnosed. Need fertilizer recommendation and treatment. Long Island, NY.

Cornell's Red Thread Guide

Cornell Fact Sheet lists:

• Resistant varieties: KBG (Ascot, Classic, Dawn...), perennial rye (Lowgrow, Lynx...), fine fescue (Biljart, Bighorn...).
• Fungicides (NY-legal): chlorothalonil (Bonide Fung-onil), myclobutanil (Spectracide Immunox), triadimefon (Bayer Advanced), azoxystrobin (Heritage), propiconazole.

Cultural Musts

• Reduce thatch (core aerate).
• Balanced fertility—avoid excess N in spring.
• Morning water only.

Red thread is manageable. Plant resistant grass, treat if severe, culture correctly.