Red Thread

Red Thread and Pink Patch.

Red Thread – Laetisaria Fuciformis
Pink Patch – Limonomyces Roseipellis

Suscepitlbe to all turf grasses, but more servere on fine Fescue and perennial Ryegrass. Commonly occurs in Autumn and Spring.

Red thread causes patches that are reddish-brown in colour and 1 to 4 inches in diameter up to 2 feet. Pink patch causes a gelatinous mass of pink mycelium with water-soaked leaves.

What to look out for:

Patches of affected grass with a reddish tinge at first, later becoming light brown or almost bleached in appearance Patches vary in size from 7.5cm (3in) to 25cm (10in) in diameter but can be much larger Two types of fungal growth may be seen on the patches, particularly under wet or humid conditions. Both are visible to the naked eye but are seen better with a hand lens or magnifying glass. The first takes the form of small, pink, cottony flocks, and can be confused with growth of the fungus causing snow mould the second is specific to red thread, and gives the disease its common name. Pinkish-red, gelatinous, thread-like structures (stromata), 1-2mm (less than ¼in) in length, are produced on the leaves and may bind them together Conditions Favouring Disease: Red thread thrives in humid conditions and in locations that are low in nitrogen. It also occurs in areas that experience more than 10 hours a day of foliar wetness for several consecutive days. Pink patch usually develops in the presence of red thread. These two similar diseases often occur under the same conditions and at the same times. It is distinguished from red thread by the absence of “red threads,” or sclerotia
These are minor diseases, in most cases does relatively little damage.

What can be done?

Fungicides are very expensive treatments, and most of the time don’t control the condition. normally promoting growth with feed will help the lawn recover and promote growth for it then to be cut off with the mower.

Currently 90% of lawns I have seen have red thread, and I would imagine with this heat and moisture we are having there are tens of thousands of lawns currently suffering with this

Any questions please contact me, please see below some images taken of Red Thread

All the best

Jon Boon

Red Thread lawn diease


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