Red Thread

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Red Thread

Red Thread is a turf disease caused by the corticoid fungus; the signs of Red Thread are yellow, red or brown patches. Red Thread has two stages; the first stage is identified on closer inspection by visible tiny red threads attached to the blades of the grass. The second stage is identified by small pink fluffy objects (which is mycelium attached to the blades of grass) and sometimes seem to be bonding two blades of grass together.

As the infection progresses, patches get larger and also new patches can start appearing.

Red Thread is caused by wet and humid conditions and unhealthy underfed lawns are more susceptible. The feeds that Lawnsavers Lawn Treatment Services apply, Hollow Tine Aeration, Scarification (if Thatch or Moss are present) and the advice we give about mowing, watering and other advice all help to promote a healthy lawn which will make the lawn less susceptible to attack; however, the main reason for the cause of Red Thread is weather conditions and this is when a fungicide may need to be applied.

Following the application the lawn should take about 2 – 3 weeks to recover.

More than one application of fungicide during the year is sometimes needed.

Red Thread usually occurs in the Summer but we have seen Red Thread in the Spring, Summer, Autumn and even Winter.

If Red Thread is present in healthy lawns that have been fed, an application of fungicide might be needed.

A common myth is if Red Thread is present in the lawn it means that it is due to lack of nitrogen and nothing else and as soon as nitrogen feed is applied, the Red Thread will disappear after about 2 – 3 weeks. This is wrong, as wet and humid weather can also cause Red Thread.

Lawnsavers Lawn Treatment Services can apply a fungicide to eradicate Red Thread if needed.


Lawnsavers Lawn Treatment Service covers Runcorn, Warrington and the
surrounding areas, including Widnes, Frodsham and Helsby. Lawnsavers objectives are to provide a professional, friendly, local and affordable service.

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