Red thread infects the leaves of grasses causing irregular patches of dead or dying grass on lawns. The fringes of the dead patches may be red/pink in colour from the fungal spores.
Red thread infects the leaves of grasses causing irregular patches of blighted turf with a pink or red tinge.
Red thread is common in spring and autumn, usually when nitrogen levels are low. It can be easily identified by red patches which grow on infected grasses. At first grass looks wet, then dies and turns pink/red.
Fungal diseases on lawns are exacerbated by stress caused by draught, poor drainage, low soil fertility, soil pH and excessively low cutting.
Image courtesy of https://www.lawnhealth.co.uk/
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