Brownish-black spots on blades of grass, circular patches of dead grass appear for no apparent reason, molds and other fungus popping up; these are all signs of a diseased lawn. Fungi spores spread through the air and water, and when the weather and your lawn conditions are right, they can take hold. At times lawn disease can spread so fast that an entire yard can be killed off in just a short amount of time! But most of the time these diseases can be fought through proper fertilization, watering, and mowing, combined with a good fungicide treatment program to control the spread of the disease until your lawn is strong enough to fight it off.
If you live in an area that is prone to fungal diseases, or if you’ve been fighting an outbreak for a long time, you might try planting a grass that is resistant to disease.