{"id":1503,"date":"2025-07-29T12:22:42","date_gmt":"2025-07-29T12:22:42","guid":{"rendered":"https:\/\/www.lawndoctor.com\/edwardsville-il\/?p=1503"},"modified":"2025-07-29T12:22:42","modified_gmt":"2025-07-29T12:22:42","slug":"turfgrass-diseases","status":"publish","type":"post","link":"https:\/\/www.lawndoctor.com\/edwardsville-il\/turfgrass-diseases\/","title":{"rendered":"TURFGRASS DISEASES"},"content":{"rendered":"

Dollar Spot \/ \u2022 Brown Patch \/ \u2022 Red Thread \/ \u2022 Gray Leaf Spot<\/strong><\/p>\n

Q: What causes these diseases?\u00a0\u00a0<\/strong><\/h2>\n

Dollar Spot:<\/strong> Caused by the fungus Sclerotinia homoeocarpa<\/em>, and thrives in warm, humid weather with high nitrogen deficiency.<\/p>\n

Brown Patch:<\/strong> Caused by Rhizoctonia solani<\/em>, it thrives in hot, humid weather and over-fertilized, overwatered lawns.<\/p>\n

Red Thread:<\/strong> Caused by Laetisaria fuciformis<\/em>, it often affects turf with low nitrogen during cool, damp periods.<\/p>\n

Gray Leaf Spot: <\/strong>Caused primarily by Magnaporthe grisea, <\/em>it thrives in warm, humid conditions and spreads through wind, rain splash, and contaminated tools or equipment.<\/p>\n

Q: How can I identify these diseases?\u00a0\u00a0<\/strong><\/h2>\n

Dollar Spot:<\/strong><\/p>\n

    \n
  • Small circular patches (1\u20132 inches).<\/li>\n
  • Leaf lesions with tan centers and reddish-brown borders.<\/li>\n
  • Webby white mycelium in early mornings.<\/li>\n<\/ul>\n

    \"\"<\/p>\n

    Brown Patch:<\/strong><\/p>\n

      \n
    • Circular brown patches (6 inches to several feet).<\/li>\n
    • Grayish \u201csmoke ring\u201d in early morning dew.<\/li>\n
    • Affected grass blades have lesions with tan centers.<\/li>\n<\/ul>\n

      \"\"<\/p>\n

      Red Thread:<\/strong><\/p>\n

        \n
      • Pink to red \u201cthreads\u201d on grass blades.<\/li>\n
      • Irregular patches, 4\u20138 inches.<\/li>\n
      • Affected leaves are water-soaked and pinkish.<\/li>\n<\/ul>\n

        \"\"<\/p>\n

        Gray Leaf Spot:<\/strong><\/p>\n

          \n
        • Leaf spots: Small, round to oval lesions with gray centers and dark brown to purple borders.<\/li>\n
        • “Melting out”: Affected blades may wither and die, causing thinning or bare patches.<\/li>\n
        • Appearance: Disease often begins in shaded, humid areas and can spread quickly.<\/li>\n<\/ul>\n

          \"\"<\/p>\n

          Fungicide Treatments for Lawn Diseases<\/strong><\/h2>\n

          1. When to Use Fungicides – <\/strong>To effectively treat and prevent lawn diseases<\/strong>, fungicide treatments can play a key role.<\/p>\n

            \n
          • Curative<\/strong>: When disease symptoms are already visible.<\/li>\n
          • Preventive<\/strong>: Before symptoms appear, especially during high-risk conditions (e.g., high humidity, warm temps, poor airflow).<\/li>\n<\/ul>\n

            Pro Tip:<\/strong> Prevention is often more effective and less expensive than curing an active outbreak.<\/p>\n","protected":false},"excerpt":{"rendered":"

            Dollar Spot \/ \u2022 Brown Patch \/ \u2022 Red Thread \/ \u2022 Gray Leaf Spot Q: What causes these diseases?\u00a0\u00a0 Dollar Spot: Caused by the fungus Sclerotinia homoeocarpa, and thrives in warm, humid weather with high nitrogen deficiency. Brown Patch: Caused by Rhizoctonia solani, it thrives in hot, humid weather and over-fertilized, overwatered lawns. Red…<\/p>\n","protected":false},"author":82,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-1503","post","type-post","status-publish","format-standard","hentry","category-lawn-care"],"acf":[],"yoast_head":"\nTURFGRASS DISEASES - Lawn Doctor of Edwardsville-Collinsville<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lawndoctor.com\/edwardsville-il\/turfgrass-diseases\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TURFGRASS DISEASES - Lawn Doctor of Edwardsville-Collinsville\" \/>\n<meta property=\"og:description\" content=\"Dollar Spot \/ \u2022 Brown Patch \/ \u2022 Red Thread \/ \u2022 Gray Leaf Spot Q: What causes these diseases?\u00a0\u00a0 Dollar Spot: Caused by the fungus Sclerotinia homoeocarpa, and thrives in warm, humid weather with high nitrogen deficiency. Brown Patch: Caused by Rhizoctonia solani, it thrives in hot, humid weather and over-fertilized, overwatered lawns. 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