The Problem

Brown Patch

Rhizoctonia spp.

Brown patch is a fungal disease of lawns which enters through the root system This fungus can grow without grass being present. It is a favourite of cool season grasses such as fescue, rye grass and bent grass and prefers hot and humid weather. The best method of control is prevention. If you’ve had the problem in previous seasons, avoid the use of high nitrogenous fertilisers in spring. Remove all lawn clippings after mowing to prevent the fungus being spread to other areas. Mow regularly to prevent excess thatch build up and irrigate in the morning only.

Symptoms

Brown patch starts with small discoloured patches of grass which later spread to form irregular dead patches a metre or more in diameter. Close inspection of the roots of damaged lawn will reveal that they have turned black.

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Solutions