Turfgrass Pathology

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Diseases of Warm-Season Turfgrasses: 

Diseases of Warm-Season Turfgrasses

Diseases of Bermudagrass: 

Diseases of Bermudagrass Spring Dead Spot Leptosphaeria korrae Fairy Ring various Basidiomycetes

Spring Dead Spot of Bermudagrass: 

Spring Dead Spot of Bermudagrass causal agent - Leptosphaeria korrae season - Spring control apply sterol inhibitor in September Banner, Rubigan, Lynx, Bayleton avoid late-season N applications

Slide4: 

Spring Dead Spot of Bermudagrass

Fairy Rings: 

Fairy Rings causal agent - Basidiomycetes season - Spring to early winter control no chemical control aggressive cultivation fertilize to mask symptoms

Slide6: 

Fairy Ring

Diseases of Zoysiagrass: 

Diseases of Zoysiagrass Zoysia (brown) patch Rhizoctonia solani Fairy Ring various Basidiomycetes

Zoysia Patch: 

Zoysia Patch causal agent - Rhizoctonia solani season – early spring and late fall control apply combination of contact and systemic fungicides Banner, Chipco (10-14 d intervals) Daconil 2787, Terraclor (7 d intervals) avoid excess N, improper watering

Slide9: 

Zoysia Patch

Diseases of Cool-Season Turfgrasses: 

Diseases of Cool-Season Turfgrasses

Brown Patch: 

Brown Patch causal agent - Rhizoctonia solani season - Summer to early fall control apply combination of contact and systemic fungicides Banner, Chipco (10-14 d intervals) Daconil 2787, Terraclor (7 d intervals) Heritage – (28 d intervals) avoid excess N, improper watering

Slide12: 

Bentgrass Tall fescue

Pythium Blight: 

Pythium Blight causal agent – pythium spp. season - Summer control apply combination of contact and systemic fungicides Banner, Bayleton Subdue, Fore, Alliette, Koban Heritage, Compass avoid excess N, improper watering

Leaf Spot: 

Leaf Spot causal agent – Cercospora / Helminthosporium season – late spring Control – Reduce moisture Resistant cultivars Raise N levels slightly Many contact fungicides are effective

Gray Leaf Spot: 

Gray Leaf Spot causal agent – Pyricularia grisea season – fall / spring control Seed treatments with fungicides Preventative fungicides such as Subdue Resistant cultivars ?? avoid excess N, improper watering

Dollar Spot: 

Dollar Spot causal agent – Rustroema floccosum Formally – Sclerotinia homoeocarpa season – spring and fall Control – Raise N levels Resistant cultivars Many fungicides are effective

Red Thread: 

Red Thread causal agent – Laetisaria fuciformis season – early spring Control – Raise N levels Many fungicides are effective