Disease Identification Guide

Pythium spp
Monday, January 31st, 2011
Damping off Patches 5 – 7.5 cm dia Red – yellow colour Festuca, Agrostis & Poa affected Too higher...
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Gaeumanomyces graminis
Monday, January 31st, 2011
Take-all Fungal attack of roots Rings 0.1 – 1m dia Mainly Bent grasses affected Summer/Autumn Water logged soils Sudden...
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Cristella confinis
Monday, January 31st, 2011
Thatch fungus Feeds upon thatch layer Develops from small patches to areas of 25-30cm Area infected becomes slightly depressed...
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Lycoperdon spp
Monday, January 31st, 2011
Type 2 Fairy Ring Basidiomycete fungi Stimulated growth due to release of surplus N Often camouflaged with extra fertilizer
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Marasmius oreades
Monday, January 31st, 2011
Type 1 Fairy Ring Basidiomycete fungi Feeds on soil organic matter, as little as 3% soil OM Does NOT...
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Myxomycetes spp
Monday, January 31st, 2011
Slime mould All grasses affected Jelly like in appearance Green – Black in colour Becomes crusty when dry Easily...
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Puccinia spp, Uromyces spp
Monday, January 31st, 2011
Rust Poa pratensis, Lolium perenne Cold weather periods in summer & autumn Yellow/orange appearance with large orange ‘Pustules’ these...
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Laetisaria fuciformas
Monday, January 31st, 2011
Red Thread Festuca rubra, Lolium perenne Insufficient available nutrient during periods of active growth Bleached grass Pink mycelium visible...
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Drechslera poae
Monday, January 31st, 2011
Leaf Spot/Melting Out Poa pratensis Late summer Browning & gradual death of plant Leaf spots have a pale centre...
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Brown Patch
Monday, January 31st, 2011
Rhizoctonia solani Circular brown patches up to 3 feet in diameter, with a greyish-black halo when dew is present....
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Colletotrichum graninicola
Monday, January 31st, 2011
Anthracnose Infected plants rot at the base Leaves become Yellow Plant easily pulled out with ease Poor growing conditions:...
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Dollar spot
Monday, January 31st, 2011
Sclerotinia homoecarpa (Lanzia & Moellerodiscus spp) Yellow-green patches Become bleached Constriction of the grass leaf Low N levels Irregular...
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Fusarium
Monday, January 31st, 2011
Microdochium nivale Orange-brown patches 2.5 – 5 cm High humidity Lush growth (N fertilizer) Wet soils pH 6 –...
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