Slime Mould

Problem Solver
Disease
Slime Mould

Slime Mould

Causal Agent

Mucilago spp., Didymium spp. & Physarum spp.

What is Slime Mould?

Slime mould is a condition in turf that initially appears as patches of slimey, wet, jelly-like substances that covers the surface of turf and lawns. While not a pathogen in turf, Slime Moulds are extremely compromising to the aesthetic value of the turf stand, and in severe cases may disrupt the playing surface.

What are the symptoms of Slime Mould?

Symptoms of slime mould include:

Fruiting bodies that smother grass blades turning them grey, pink, purple, white or yellow.
Affected turf forms rings up to 60cm in diameter as the Slime Mould grows outwards. The rings normally disappear within 2 weeks.
No immediate damage to turfgrass is evident as slime moulds are not plant parasitic.
Fruiting bodies may become so thick on leaf blades that they may reduce the photosynthetic ability of individual leaves.

Slime Mould INFO SHEET

What turfgrasses are susceptible to Slime Mould?

All turfgrass species.

What does Slime Mould occur?

The conditions favouring slime mould are:

Excessive thatch favours slime mould development.
High levels of soil organic matter are a food source for Slime Mould so contributes to a favourable environment.
Cool, wet, humid weather is ideal for fruiting body development.
High cut, unmaintained turfgrass with infrequent mowing.

What can I do to manage or control Slime Mould?

Turf management practices that can help control or reduce instances of slime mould include:

Physical removal of Slime Mould by spraying with water jets or raking is possible.
Ensure thatch and organic matter is not excessive.
Maintain frequent mowing to reduce physical development of fruiting bodies.
Good hygienic practices between affected and unaffected surfaces will reduce spore transport