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Turf grass Diseases Kevin Korus

Symptom Distribution

Field

Plant

Leaf

Symptom Distribution – Field Symptom Distribution – Plant

Symptom Distribution – Leaf Brown Patch

• Host(s): Ryegrasses, tall fescue, creeping bentgrass, Kentucky bluegrass

• Pathogen(s): Rhizoctonia solani

plantscience.psu.edu

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Powdery Mildew

• Host(s): Kentucky bluegrass

• Pathogen(s): Erysiphe graminis

www.ksuturf.org

www.ksuturf.org

Necrotic Ring Spot

• Host(s): Kentucky bluegrass

• Pathogen(s): Ophiosphaerella korrae

extension.umass.edu

Summer Patch

• Host(s): Kentucky bluegrass, Annual bluegrass, Fine fescue

• Pathogen(s): Magnaporthe poae

Pythium Blight

• Host(s): Perennial ryegrass, Creeping bentgrass, Annual bluegrass

• Pathogen(s): Pythium spp.

plantscience.psu.edu

www.apsnet.org

Leaf Spot and Melting Out

• Host(s): Kentucky bluegrass, perennial ryegrass and tall fescue

• Pathogen(s): Bipolaris and Drechslera spp.

plant-pest-advisory.rutgers.edu

Gray Leaf Spot

• Host(s): Perennial ryegrass and tall fescue

• Pathogen(s): Pyricularia grisea

extension.umass.edu

3/25/2015

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Dollar Spot

• Host(s): All cool-season turf. Most common on bentgrass and bluegrass

• Pathogen(s): Sclerotinia homoeocarpa

www.apsnet.org

www.turfdiseases.org

www.rheebo.com

Anthracnose

• Host(s): Annual bluegrass, creeping bentgrass, most warm and cool season grasses

• Pathogen(s): Colletotrichum cereale

www.msuturfdiseases.net

extension.umass.edu

plantscience.psu.edu

Ascochyta Leaf Blight

• Host(s): Kentucky bluegrass, perennial ryegrass, tall fescue

• Pathogen(s): Ascochyta spp.

www.ext.colostate.edu www.ipm.iastate.edu

Mushrooms/Fairy Rings

en.wikipedia.org

www.parkwaylawn.com

Slime Molds

• Protists

www.ipm.iastate.edu