Disease Identification Guide

Monday, January 31st, 2011

Damping off Patches 5 – 7.5 cm dia Red – yellow colour Festuca, Agrostis & Poa affected Too higher...

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...

Monday, January 31st, 2011

Thatch fungus Feeds upon thatch layer Develops from small patches to areas of 25-30cm Area infected becomes slightly depressed...

Monday, January 31st, 2011

Type 2 Fairy Ring Basidiomycete fungi Stimulated growth due to release of surplus N Often camouflaged with extra fertilizer

Monday, January 31st, 2011

Type 1 Fairy Ring Basidiomycete fungi Feeds on soil organic matter, as little as 3% soil OM Does NOT...

Monday, January 31st, 2011

Slime mould All grasses affected Jelly like in appearance Green – Black in colour Becomes crusty when dry Easily...

Monday, January 31st, 2011

Rust Poa pratensis, Lolium perenne Cold weather periods in summer & autumn Yellow/orange appearance with large orange ‘Pustules’ these...

Monday, January 31st, 2011

Red Thread Festuca rubra, Lolium perenne Insufficient available nutrient during periods of active growth Bleached grass Pink mycelium visible...

Monday, January 31st, 2011

Leaf Spot/Melting Out Poa pratensis Late summer Browning & gradual death of plant Leaf spots have a pale centre...

Monday, January 31st, 2011

Rhizoctonia solani Circular brown patches up to 3 feet in diameter, with a greyish-black halo when dew is present....

Monday, January 31st, 2011

Anthracnose Infected plants rot at the base Leaves become Yellow Plant easily pulled out with ease Poor growing conditions:...

Monday, January 31st, 2011

Sclerotinia homoecarpa (Lanzia & Moellerodiscus spp) Yellow-green patches Become bleached Constriction of the grass leaf Low N levels Irregular...

Monday, January 31st, 2011

Microdochium nivale Orange-brown patches 2.5 – 5 cm High humidity Lush growth (N fertilizer) Wet soils pH 6 –...