5 Common Lawn Diseases

  1. Snowmold is most common to Kentucky Bluegrass and Fescues in¬† regions where snow falls and sits on the lawn for extended periods of time The best prevention for snowmold is to aerate often. Improving water drainage, raking leaves off lawn’s surface, and follow a¬†fertilization schedule to help prevent over-fertilization in the late-fall can also help. The most common fungicide¬†use on¬†Snowmold is benomyl.
  2.  Brown Patch is most common to Bermuda, Kentucky Bluegrass, Centipede Grass, Bent Grass, St. Augustine, and ryegrasses in regions with high humidity and/or shade. Brown patch commonly starts as a small spot and can quickly spread outwards in a circular or horseshoe pattern up to a couple of feet wide. Often times, while expanding outwards, the inside of the circle will recover, leaving the brown areas resembling a smoke-ring. The best prevention for brown patch is to aerate often, reduce shade to effected areas, and follow a fertilization schedule to help prevent fertilization with excess amounts of nitrogen. The most common fungicides used on Brown Patch are: benomyl and chlorothalonil.
  3. Dollar spots are most common to Kentucky Bluegrass, Bent Grass, and Bermuda in humid climates. They get their name from their  small silver dollar-like shape, but can begin as the size of a small grapefruit. Usually looks brown or straw-colored in appearance. The spots may merge to form large patches several feet wide. Dollar spot is most common during warm, wet weather with heavy dews and in those lawns with low levels of nitrogen.The best prevention for brown patch is aerate often, water only in the morning hours if additional water is necessary, remove excess thatch, and follow a fertilization schedule to help increase the amount of nitrogen levels in your lawn.  The most common fungicides used are: benomyl, anilazine, and thiophanate.
  4. Fairy Rings can grow in most grasses, and are distinguishable by circular rings filled with fast-growing, dark-green grass. Around the perimeter of the ring, the grass will typically turn brown and often times grow mushrooms. Fairy rings typically grow in soils that contain wood debris and/or old decaying tree stumps.The best prevention for fairy ring is to aerate the diseased area, water well in the morning hours, remove excess thatch, and follow a fertilization schedule to help increase the amount of nitrogen levels in your lawn. Unfortunately there is no cure once established
  5. Rust gets its name from the orange, “rusty”appearance it gives leaf blades. Most commonly effecting ryegrasses and Kentucky Bluegrass, rust tends to flourish in conditions of: morning dew, shade, high soil compaction, and low-fertility. The best way to check for rust problems is by taking a white tissue or paper towel and rubbing¬†a few grass blades through it. If an orange color remains, then¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬† it’s usually rust.The best prevention for rust is to aerate your lawn, water well in the morning hours, reduce shade to grass, mow more frequently and bag grass clippings; follow a fertilization schedule to help increase the amount of nitrogen levels in your lawn. If Rust has been a problem in the past, mow frequently and remove clippings from lawn. The most common fungicides used on Rust are: Triadimefon and Anilazine.

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