We spend thousands of dollars on our lawns, and hundreds of hours of work to make them beautiful, but sometimes there just is no protection against a common lawn fungus, and it can take months to bring our lawns back from an attack. So be proactive; mow and water regularly, and learn to recognize the signs of a fungal attack so that applications of a fungicide can save your lawn and help your wallet.
Common fungus types are the following:
Fairy Ring:
Bright green circular areas that appear to be growing more rapidly than the rest of your lawn are probably fairy rings, a fungus that often occurs after an extremely rainy period. If the fairy ring consists only of mushrooms or puffballs, with no stimulated grass growth, simply rake off and dispose of these fungal fruiting structures. If handling the mushrooms, wash your hands when done.
As serious injury to the turf does not occur often with fairy rings, the most practical method of dealing with them in lawns is through a cosmetic approach. Disguise the symptoms by providing adequate water deep into the root zone, and by applying moderate rates of fertilizers. This will increase the vigor of the surrounding grass to the level more like that of the grass in the fairy ring. Excessive application of water or fertilizer should be avoided as either may contribute to other turf diseases or stimulate fairy ring development. More frequent mowing may make the difference in height between the grass of the fairy ring and adjacent grass less conspicuous.
Dollar Spot:
That straw-colored spot the size of a silver dollar in your lawn is a fungus that thrives on dry, undernourished lawns. Appearing as small, white cobwebby spots in the morning that turn brown later in the day, Lawns under stress from not having been fed or watered enough are most susceptible to dollar spot. Maintaining a regular feeding program with a slow-release lawn fertilizer can help prevent the disease, and even help underfed lawns recover from it. Controlling thatch in the lawn can help, too.
Don't Spread It Dollar spot can be spread easily by people walking on the grass or by hoses, lawnmowers, and other turf equipment. So if you find dollar spot on your lawn - or on the golf course - try not to walk across it. Also, if you use a mowing service, ask whether the company cleans the blades regularly. The disease can hitch a ride on dirty blades.
If Dollar Spot Persists apply a lawn fungicide like Scotts Lawn Fungus Control.
Pythium Blight:
This particular fungus presents as a blackened, water-soaked appearance of patches of grass in your lawn. During humid weather, you may also see a cottony growth also known as cottony blight or grease spot. Prevention is your best method of avoiding it; water your lawn in the early morning instead of the late evening.
Rhizoctonia blight:
Also called brown patch or summer patch, this is a fungus that kills circular patches of the grass up to 2 feet in diameter. It flourishes in warm temperatures, especially with damp conditions caused by thatch.
Apply Scotts Lawn Fungus Control at the first sign of disease. To avoid reccurrence, remove underlying thatch with a rake or a dethatcher, avoid applying heavy doses of nitrogen fertilizers, and improve drainage.
This is by no means a complete list of lawn fungals, but the common themes of over-watered lawns, dry lawns, and poorly maintained lawns can lead to unwanted fungus. If you see what you think may be a problem, identify the condition, and treat accordingly. Our garden center experts are here to help you grow and maintain a beautiful and healthy lawn. |