Fusarium patch (or snow mould) affects gardens of all sizes and varieties. Discover what you can do to protect your lawn from snow mould this winter, including scarification treatments, and how it can be treated if you’ve already seen the effects. Looking after your lawn ensures it looks fantastic all year around and it's also good for the environment! Read more...
What is Fusarium Patch?
Fusarium patch, which is also known as snow mould, is a type of fungus that affects turf grass. It is seen most commonly in autumn and winter when the wet weather combines with snow or leaf covering, making the perfect conditions for fusarium patch (snow mould) to thrive and damage your lawn.
Fusarium patch is sometimes also referred to as pink snow mould - as one stage of the fungus can appear pink - or microdochium patch - as the fungus that causes the pink variety of the disease is called Microdochium Nivale. There is also another variety which is grey snow mould - typhula incarnate. It can be a hard disease to control, so the very best thing is to try to prevent it. However, it can be treated effectively and lawns can fully recover within a relatively short space of time.
What Causes Fusarium Patch?
The fungus, although it can survive temperatures below freezing, doesn’t grow well below freezing. However, a layer of snow over the grass keeps the grass insulated from the freezing temperatures, providing the perfect conditions for snow mould to thrive.
Microdochium Nivale loves moist and damp conditions. When snow or leaves layer over grass, they not only protect the fungus from frost but also prevent moisture from evaporating. It creates extremely damp conditions, allowing the fusarium patch to develop.
Layers of cover also increase the amount of carbon dioxide around the grass and fungus, helping the fusarium patch to grow.
The fungus’ spores are usually carried into the garden via the wind. The lawn can be infected during summer and the snow mould begin to grow, but won’t be noticeable until autumn or winter’s wet weather conditions, combined with a decreased rate of grass growth.