Rusts

Rust (Puccina spp, Uromyces spp)

There are many rust diseases of turf grasses.

Susceptible species to this are Perennial ryegrass and Poa pratensis. This can occur all year round but most common from early summer to late autumn, during mild humid weather, low fertility and infrequent mowing regime. The affected turf appears rust-coloured, due to the production of numerous yellow or orange spores on the leaf. Spores adhere to fingers when rubbed.
Conditions that favour rusts are warm, humid summers. Most often seen in long grasses.

Regular mowing will help to discourage rust attack. Ensure adequate fertility in particular with regard to nitrogen.