Turfgrass Pathology

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Information about Turfgrass Pathology

Published on September 9, 2008

Author: gooseunl

Source: authorstream.com

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

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