The Lawn Man

Take-All Patch

Caused by: Gaeumannomyces graminis (Sacc.) Arx & D. Olivier var. avenae (E. M. Turner) Dennis.

Take-All Patch

Plate 1: Early symptoms of Take-all Patch

Description

Take-all patch symptoms begin as a slight reddening or bronzing of bentgrass usually in a ring during summer months (Plate 1). As the bentgrass dies resistant grass species or broad-leaved weeds invade the centre of the patch (Plate 2). Patches can measure from a few centimetres in diameter to over a metre. Symptoms may fade in late autumn and winter.

Take-All Patch

Plate 2: Symptoms of Take-all Patch

Where is take-all patch found?

Swards dominant in bentgrass

In most cases, take-all patch affects newly established areas (especially on sand or USGA specification constructions or areas that have been sterilised prior to establishment).

Some golf courses have problems with take-all patch year after year. This is usually associated with alkaline irrigation water or rootzones with high alkaline buffering capacity.

When is take-all patch likely to attack turf?

Symptoms are most common during summer months and tend to fade out during winter months.

Effects of take-all

On greens, take-all patch can affect the playing quality as the patches become depressed affecting ball roll.

As bentgrass is affected Poa annua grass ingress may occur in the space created.

High risk situations

Newly constructed sand/USGA specification greens or following rootzone sterilisation

Alkaline rootzones

Alkaline irrigation water

Application of lime

Excessive thatch

Poor drainage

Inadequately balanced nutrition

Lack of manganese


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