Is Dollar Spot Fungus Harmful to Humans? Exploring the Potential Health Risks

If you’re a homeowner or gardening enthusiast, it’s important to be aware of common lawn diseases like Dollar Spot Fungus. This fungal disease affects various types of grass, causing small, circular spots on blades that can merge into larger patches of dead grass.

Fortunately, while it’s essential to manage Dollar Spot Fungus to prevent unsightly damage to your yard, it poses no health risks to humans.

Dollar Spot Fungus is caused by the pathogenic fungus Clarireedia jacksonii, which thrives in warm, humid conditions. Preventing and controlling this fungus is crucial to maintain a healthy lawn. In the following section, we’ll explore more about Dollar Spot Fungus, including its effects on grass and how to prevent and control it.

Key Takeaways

  • Dollar Spot Fungus does not pose any health risks to humans.
  • Dollar Spot Fungus is caused by the pathogenic fungus Clarireedia jacksonii.
  • Preventing and controlling Dollar Spot Fungus is important to maintain a healthy lawn.
Is Dollar Spot Fungus Harmful to Humans

Is Dollar Spot Fungus Harmful to Humans

Dollar spot fungus is a common lawn disease that can cause serious damage to your grass if left untreated. While the fungus itself isn’t known to be deadly, it can still cause some issues for humans if we come into direct contact with it. These include skin irritation or allergic reactions, redness, itching, and swelling.

To avoid any unwanted skin problems, it’s best to take a few precautions when handling infected grass. Wear protective gloves to reduce the risk of skin contact.

It’s important to note that dollar spot fungus is not contagious and cannot spread from person to person. However, it can spread from lawn to lawn, so it’s important to take steps to prevent the spread of the disease.

If you do come into contact with dollar spot fungus, wash the affected area thoroughly with soap and water. If you experience any symptoms such as itching or swelling, seek medical attention. Remember, dollar spot fungus is not harmful to humans as long as you take the necessary precautions when handling infected grass.

Understanding Dollar Spot Fungus

Dollar Spot Fungus

Origin and Characteristics

Dollar spot fungus is a type of fungal disease that can affect various types of turfgrass, including creeping bentgrass, perennial ryegrass, Kentucky bluegrass, and zoysia grass.

The pathogen responsible for the disease is called Clarireedia jacksonii, which causes small white or tan spots on the grass blades, typically about the size of a silver dollar. The fungus can be identified by the white or tan lesions it causes on the grass blades.

Common Areas of Growth

Dollar spot fungus is most commonly found in areas where the grass is under stress, such as in dry or drought conditions. It can also occur in areas where the grass is overwatered or where the soil is compacted.

Golf courses, sports fields, and residential lawns are all common places where dollar spot fungus can grow. To prevent the spread of the fungus, it is important to maintain healthy grass by watering and fertilizing appropriately and ensuring proper drainage.

Mowing the lawn at the right height can also help prevent the fungus from spreading. Short lawns (under 3 inches) are more susceptible to dollar spot infection because they hold moisture on grass leaves. It is recommended to raise your mower blade to the recommended 3 to 4 inches.

Related Posts:

Effects of Dollar Spot Fungus on Humans

If you’re wondering whether dollar spot fungus poses any risks to humans, here’s what you need to know.

Direct Contact

Direct contact with dollar spot fungus is unlikely to cause harm to humans. The fungus mainly affects grass blades and stems and does not produce toxins that can harm humans.

However, it is still a good idea to avoid touching the affected grass and to wear gloves if you need to handle it.


Inhalation of dollar spot fungus spores can cause respiratory problems in some people. Exposure to the spores can trigger allergic reactions in people who are sensitive to fungi. Symptoms may include sneezing, coughing, wheezing, and shortness of breath.

It is important to note that not everyone who is exposed to dollar spot fungus spores will develop respiratory problems. However, if you have a history of respiratory problems or allergies, it is best to avoid exposure to dollar spot fungus spores.

Related Posts:

Prevention and Control of Dollar Spot Fungus

Dollar spot fungus is a common problem that affects turfgrass, golf courses, and other grassy areas.

While it is not harmful to humans, it can cause significant damage to your lawn. Here are some tips on how to prevent and control dollar spot fungus:

Garden Maintenance Tips

To prevent dollar spot fungus from appearing on your lawn, it is important to maintain your lawn properly. Here are some garden maintenance tips:

  • Mow your lawn at the correct height: Mowing your lawn too short can create stress on the grass and make it more susceptible to dollar spot fungus. Keep your mower blade sharp, which will reduce stress on the grass and help prevent diseases like dollar spot from occurring. Additionally, removing leaf wetness early in the morning with dew whips, mowing, or lightweight rollers can help decrease the incidence of dollar spot.
  • Water your lawn properly: Overwatering your lawn can create a favorable environment for dollar spot fungus. Water your lawn deeply and infrequently to promote deep root growth and avoid creating wet conditions on the surface.
  • Fertilize your lawn: A well-fertilized lawn is more resistant to dollar spot fungus. Use a slow-release fertilizer to provide nutrients to your lawn over time. Avoid over-fertilizing, as this can create stress on the grass and make it more susceptible to diseases.
  • Improve soil health: Healthy soil is essential for a healthy lawn. Test your soil to determine its pH and nutrient levels, and amend it as needed to create a healthy growing environment for your grass.

Chemical Control Methods

If you have a severe dollar spot fungus problem, chemical control methods may be necessary. Here are some chemical control methods to consider:

  • Fungicides: Fungicides can be effective in controlling dollar spot fungus. Apply fungicides according to the manufacturer’s instructions, and be sure to follow all safety precautions. Keep in mind that fungicides are not a long-term solution and should be used in conjunction with other preventative measures.
  • Biological control: Some beneficial microorganisms can help control dollar spot fungus. These microorganisms can be applied to your lawn as a preventative measure to help suppress the growth of dollar spot fungus.

By following these tips, you can prevent and control dollar spot fungus and keep your lawn healthy and beautiful.

Remember to always follow manufacturer’s instructions when using chemical control methods, and be sure to take all necessary safety precautions.

Related Posts:

Potential Health Risks to Humans

Potential Health Risks to Humans

Direct Contact

Dollar Spot Fungus may cause skin irritation, redness, itching and swelling if you come into direct contact with it. To avoid these issues, it is recommended to wear protective gloves and wash your hands thoroughly after handling infected grass.


Inhaling the spores of the fungus can cause respiratory problems such as allergic reactions and asthma flare-ups. If you have respiratory conditions, it is important to be extra cautious around areas affected by the fungus.


While ingesting the fungus or contaminated grass is unlikely, the potential risks are unknown. It is best to avoid this scenario altogether.

 Frequently Asked Questions (FAQs)

What are the symptoms of Dollar Spot Fungus on turfgrass?

The symptoms of Dollar Spot Fungus infection include small, straw-colored, circular patches on the lawn and bleached white or silver lesions on grass blades. These symptoms can help you identify the presence of the fungus in your lawn and take appropriate measures to manage it.

Can Dollar Spot Fungus cause respiratory problems in humans?

Yes, inhaling fungal spores from Dollar Spot Fungus can lead to respiratory issues, such as asthma flare-ups and allergic reactions, especially in individuals with pre-existing respiratory conditions. To minimize the risk, it’s important to maintain proper lawn care, use resistant turfgrass varieties, and avoid exposure to affected areas if you have respiratory concerns.

How can I manage Dollar Spot Fungus and protect myself from potential health risks?

To manage Dollar Spot Fungus and protect yourself from potential health risks, you can follow these strategies:
1. Use cultural control methods: Adequate fertilization, proper irrigation, appropriate mowing techniques, and thatch management.
2. Implement biological control methods: Introduce beneficial microorganisms or use disease-suppressive composts.
3. Apply chemical control methods as a last resort: Choose eco-friendly fungicides and follow proper application guidelines.
Additionally, wear protective gloves when handling infected grass and wash your hands thoroughly after contact.

Are chemical fungicides for Dollar Spot Fungus safe for humans and the environment?

Chemical fungicides can pose risks to human health and the environment, including acute and chronic exposure, environmental contamination, and harm to non-target organisms. When using chemical fungicides, it’s crucial to follow label instructions, wear protective gear, and consider eco-friendly alternatives or Integrated Pest Management strategies to minimize potential risks.


In conclusion, while Dollar Spot Fungus may not pose a significant threat to human health, it can cause serious damage to your lawn if left untreated. Preventing and managing the disease is key to maintaining the health and beauty of your lawn.

Some effective strategies include regular mowing, proper watering, and avoiding excess nitrogen fertilization. Additionally, removing thatch buildup and improving soil drainage can help prevent the fungus from taking hold.

If you do notice signs of Dollar Spot Fungus, prompt treatment with fungicides can help control the disease. Remember, prevention is always better than cure, so be sure to take the necessary steps to protect your lawn from this common fungal disease.

Related Posts:

Similar Posts