There are several types of grass fungus that unfortunately most home owners will have to battle with from time to time. Sadly, there is not just one effective technique to eliminate grass fungus, but several depending on which type your lawn currently has. However, there are some general tips you can use when combating these lawn diseases, and learn how to identify which ones your yard is battling.
Most Common Types of Grass Fungus:
This type of disease gets its name from the fact that it usually crops up after snow starts melting in certain climates. It's actually always present in most lawns, it just needs a certain environment in order to grow. In this case, very cold (below freezing) is where this disease thrives, which is generally the condition under compacted snow.
These patches are about the size of a dinner plate, but can be larger. Around the edges you should be able to see a faint gray or pink fungal growth. Avoid stepping on your yard during the winter months so that snow does not become compacted. As well, as temperatures rise, snow mold can not survive. So it's best just to wait it out if you have an infection.
This is one of the most destructive of grass fungus, and it thrives in very hot weather. This is thanks to the humidity and heat adding extra stress on your lawn.
It appears as large circular brown spots on your yard and can often be identified by a dark ring around the outer edges.
Do not mow during very hot days so as not to add even more stress, or risk spreading this disease, as well avoid fast releasing nitrogen fertilizer as it will add even more stress.
Finally, be sure to give the areas lots of light by pruning overhanging branches and moving things that are blocking its light.
Like Brown Patch, Dollar Spot enjoys warm climates and grows when it's very hot outside. If you have Dollar Spots, they will appear as little circles of gray or silver. If you look closer at the edges of the grass blades, you will also be able to notice an hour glass shaped brown or red edge.
Low soil moisture is one of the most common reasons why this type of fungus grows. Be sure to adequately water your lawn.
Low nitrogen levels also play a big part in Dollar Spot growth. Use a well balanced fertilizer in the affected areas to help raise those levels.
Some people actually like the look of Fairy Rings. These can be very tough to get rid of and appear thanks to a couple of different fungi. However, the treatment is the same.
Fairy Rings appear as a large dark circle, or a circle of mushrooms around the affected area. They are created thanks to fungi threads under the soil that starve your grass and kill it by taking away its nutrients.
If the Fairy Ring contains toadstools, cut them from their base and burn them. As well, mow the affected area of the lawn separately from the rest of your lawn. That is, once you've mowed the affected area, gather the grass clippings and burn them so you do not spread the spores.
Probably the best method when dealing with these is to actually dig up the lawn where the roots are, and destroy them while reseeding / sodding / turfing the area that you've dug up. It's a lot of work, but once these are there, even a good fungicide might not help much.