E EvapIQ
Free Disease Library

Turf disease knowledge, for anyone who needs it.

Not every course can afford a certified agronomist. This library gathers the same university and extension research EvapIQ uses internally - pathogens, symptoms, season, region, and where to read more - in one free, public place, so a mom-and-pop operation has somewhere real to start.

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Full Library

All Diseases (A-Z)

30 diseases, researched from Penn State, Rutgers, Michigan State, NC State, and other university extension sources.

Algae / Wet Surface A Anthracnose B Bacterial Etiolation / Wilt Brown Patch B Brown Ring Patch C Copper Spot / Zonate Leaf Spot Curvularia / Nigrospora Blight Dollar Spot Fairy Ring Gray Leaf Spot Gray Snow Mold L Large Patch Leaf Spot / Melting-Out Microdochium Patch Necrotic Ring Spot Pink Snow Mold Plant-Parasitic Nematodes Powdery Mildew P Pythium Blight P Pythium Root Rot Red Thread Rust Slime Mold Southern Blight S Spring Dead Spot S Summer Patch T Take-All Patch Take-All Root Rot Y Yellow Patch Y Yellow Tuft / Downy Mildew

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Every profile above has full scouting notes, management notes, and reference photos behind a free EvapIQ account - no course, no payment, just an account.

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This is identification help, not a diagnosis. Symptoms described here can overlap between diseases and other causes (drought, wear, nutrient deficiency). When you're not sure, or before applying any treatment, contact your state's Cooperative Extension office - most offer free or low-cost diagnosis and know your local conditions best.