Dollar Spot Disease Control Measures

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Questions and Answers

What is the recommended mowing height for Common Bermudagrass?

  • ¾ to 1¼ inches (correct)
  • 1½ to 2 inches
  • 1 to 1½ inches
  • ½ to 1 inch

Which of the following mowing practices should be avoided?

  • Mowing early in the morning
  • Removing more than 1/3 of the grass blade (correct)
  • Mowing regularly
  • Mowing with a dull blade

What contributes to the spread of Dollar Spot disease in lawns?

  • Frequent watering in the afternoon
  • Hot and humid weather (correct)
  • Cool and dry weather
  • High mowing height

How can infestations of Dollar Spot disease be managed?

<p>By changing temperature and cultural practices (C)</p> Signup and view all the answers

What should be done if a lawn is heavily damaged by Dollar Spot disease?

<p>Use sod or the appropriate grass seed for repairs (B)</p> Signup and view all the answers

What is the recommended mowing height for St. Augustine grass?

<p>3 to 4 inches (C)</p> Signup and view all the answers

In order to effectively manage turf health, when is the best time to water?

<p>Early morning (D)</p> Signup and view all the answers

To maintain a healthy lawn, what crucial mowing practice should be followed?

<p>Keep the mowing height consistent with grass type (C)</p> Signup and view all the answers

What characterizes the spots caused by Dollar Spot disease?

<p>Small, round spots that resemble the size of a silver dollar (B)</p> Signup and view all the answers

What is a recommended cultural practice to help reduce the spread of Dollar Spot disease?

<p>Core aeration of the lawn (B)</p> Signup and view all the answers

Which grass types are most susceptible to Dollar Spot disease?

<p>Kentucky Bluegrass and Perennial Ryegrass (A)</p> Signup and view all the answers

What fungus causes Dollar Spot disease?

<p>Sclerotinia homoeocarpa (A)</p> Signup and view all the answers

What is the ideal frequency for watering a lawn under normal conditions?

<p>A few times per week for 30-45 minutes (A)</p> Signup and view all the answers

Which of the following statements about the conditions for Dollar Spot disease is true?

<p>Warm, humid conditions favor its spread (B)</p> Signup and view all the answers

What is a potential consequence of not following proper fertilization practices for lawns?

<p>Increased risk of lawn diseases such as Dollar Spot (C)</p> Signup and view all the answers

What is the main benefit of using slow-release granular fertilizers for lawns?

<p>They provide consistent nutrient release over time (A)</p> Signup and view all the answers

Flashcards

What is Dollar Spot Disease?

A common fungal lawn disease that primarily affects cool-season grasses like Kentucky Bluegrass, Perennial Ryegrass, and Fine Fescue.

What causes Dollar Spot disease?

The fungus that causes Dollar Spot disease, thriving in warm, humid conditions and spreading through contact or air.

How does Dollar Spot disease look?

Straw or tan colored spots, typically the size of a silver dollar, with a reddish-brown border, that appear on affected grass.

How to prevent Dollar Spot disease?

A healthy, thick lawn serves as the best defense against Dollar Spot disease.

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How does core aeration help prevent Dollar Spot disease?

Improves soil drainage, reduces compaction, and allows water and nutrients to reach deeper, all contributing to a healthier lawn and reducing the likelihood of diseases.

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How does regular fertilization help prevent Dollar Spot disease?

Regular applications of specially formulated, slow-release granular fertilizer provide the lawn with the nutrients it needs to stay healthy and resist diseases.

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How does proper watering help prevent Dollar Spot disease?

Watering your lawn a few times a week for 30-45 minutes in each area helps maintain a healthy lawn, making it less susceptible to diseases.

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How to water during hot & dry periods?

During hot and dry periods, increase watering to keep the lawn green and healthy, helping to prevent disease.

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Early Morning Watering

Watering your lawn in the early morning allows the grass to dry before nightfall, reducing the risk of fungal diseases.

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Regular Mowing

Regularly mowing your lawn with a sharp blade prevents damage and promotes healthy growth.

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Mowing Height

Cutting more than 1/3 of the grass blade at a time can stress the plant and make it vulnerable to disease.

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Bermudagrass Mowing Height

The recommended height for mowing Bermudagrass varies depending on the type, ranging from ¾ to 1½ inches.

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Centipedegrass and Zoysiagrass Mowing Height

Centipedegrass and Zoysiagrass prefer a mowing height of 1 to 2½ inches.

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St. Augustinegrass Mowing Height

St. Augustinegrass thrives with a mowing height of 3 to 4 inches.

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Dollar Spot Disease

Dollar Spot disease thrives in hot, humid conditions and can cause damage to your lawn.

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Controlling Dollar Spot Disease

Controlling Dollar Spot disease can involve adjusting cultural practices, like watering and mowing, and in severe cases, might require professional treatment.

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Study Notes

Dollar Spot Disease

  • Fungal disease affecting lawns, particularly cool-season grasses (Kentucky Bluegrass, Perennial Ryegrass, Fine Fescue)
  • Characterized by small, round, straw or tan-colored spots (similar to a silver dollar)
  • Spots may have reddish-brown borders
  • Spots can merge to form larger patches of dead/dying grass
  • Caused by Sclerotinia homoeocarpa fungus
  • Thrives in warm, humid conditions
  • Spreads via grass blades, equipment, shoes, and other lawn tools

Control Measures

  • Core Aeration: Improves soil drainage to reduce disease likelihood, allowing water and nutrients to penetrate deeper

  • Fertilize Regularly: Use Weed Man's slow-release fertilizer for adequate nutrients, timing is important to avoid over-fertilizing

  • Watering: Water lawn regularly (30-45 minutes per zone) during hot/dry periods, watering in early morning allows turf to dry before nightfall

  • Mowing: Maintain regular mowing schedule with sharp blades, remove no more than â…“ of the grass blade at any one time

  • Recommended Mowing Heights (specific heights for different types of grass)

    • Common Bermudagrass: 3/4 to 1 1/4"
    • Hybrid Bermudagrass: 1/2 to 1 1/2"
    • Centipedegrass: 1 to 2"
    • Zoysiagrass: 1 to 2 1/2"
    • St. Augustine: 3 to 4"
    • Fescue: 3 to 4"
  • Dollar Spot is difficult to control in hot, humid conditions, but cultural practices can help limit the spread.

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