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Joan from New Brighton says:

05/02/11 06:10 PM

I have used Guaranteed since the early 90's and I have enjoyed watching there company grow without compromising the service they have provided to us! we love supporting our local companies


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Refer a Neighbor... or a Friend

Receive one free Fertilizer and Weed control application on your next service when you refer a neighbor or a friend to Guaranteed Turf Care and they sign up for our Nature Green or Weekender Mowing program.

It’s easy to identify and treat dollar spot fungus in your lawn. Dollar spot is a disease of turfgrass that gets its name from the straw-colored, silver dollar-sized spots that appear on golf greens.
The disease causes larger spots on higher cut turfgrass in residential lawns. Dollar spot disease of lawns usually appears in somewhat irregular circles three to six inches in diameter. If the spots join together, a more general blight may be observed. Examining individual leaves can make a more certain diagnosis of this disease. The typical dollar spot lesion is straw colored and girdles the entire leaf blade. The top and bottom borders of the lesion are usually dark reddish-brown and the lesion often has an hourglass shape. If the infected grass is examined in the morning while dew is still present, the white web-like mycelium of the fungus may be observed. 

Dollar spot is most common in early summer, late summer, and early fall in humid weather with warm days and cool nights. Dollar spot is less prominent in very hot weather. 

Dollar spot has traditionally been attributed to the one fungus, Sclerotinia homoeocarpa, but there maybe other fungi involved in the disease complex. They survive as resting mycelium and as linear black mycelial inclusions called stromata in the thatch. Turfgrasses appear to be more susceptible to infection when nutrient-deficient and when the soil is dry, probably because both factors reduce the vigor of the grass plants.

Usually only the leaf blades become infected and it doesn’t affect the crown or roots. Therefore, dollar spot rarely causes severe damage on lawn grasses. All turfgrasses are susceptible to dollar spot disease, but some Kentucky bluegrass cultivars are relatively resistant. Dollar spot disease usually occurs on lawns that are nitrogen-deficient. Application of fertilizer will stimulate growth and the infected leaf blades may be mowed off. Sufficient water should be applied when rainfall is sparse. Thick thatch stresses the turfgrass and increases dollar spot. If dollar spot is present in the lawn, it is best to mow only when the grass is dry to prevent spreading the fungus and to remove the clippings. Mow the grass high and do not remove more than 1/3 of the leaf blade at a single cutting to avoid stress. Water deeply and infrequently. Light sprinklings especially late in the day will increase disease susceptibility. 

Dollar spot disease responds readily to fungicides, but application of fertilizer and attention to watering practices is usually sufficient to minimize the disease. Dollar spot rarely causes sufficient injury to lawns to justify the use of fungicides.

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