Hello,

Based on what I see in your images and the symptoms you’re describing on your lawn in Michigan—spidery wet dew followed by white patches—could be indicative of a common turfgrass disease known as Dollar Spot. This disease is caused by the fungus Clarireedia jacksonii and is characterized by white or tan spots of dead turf that can be about the size of a silver dollar on closely mowed areas like golf greens. On home lawns mowed at higher heights, these spots may reach 2 to 5 inches in diameter. More information at this link:

Turfgrass Diseases: Dollar Spot (Causal fungus: Clarireedia jacksonii) (psu.edu)

White mycelia, a thread-like webbing produced by the fungus, can sometimes be observed on diseased leaves in the early morning, especially following rainy periods or on dew-covered grass. More information at this link:

Turfgrass Diseases: Dollar Spot (Causal fungus: Clarireedia jacksonii) (psu.edu)

Dollar spot is more severe on turf that is under-fertilized or when grass growth is slow. It tends to peak in late summer under high humidity and temperatures ranging from 60° to 85°F. More information at this link:

Turfgrass Diseases: Dollar Spot (Causal fungus: Clarireedia jacksonii) (psu.edu)

Another possibility could be damage from sod webworms, which are the caterpillar stage of lawn moths. They can cause small, brown patches of closely clipped grass that may come together to form large, irregular, dead areas. More information is at this link:

Sod webworm: Tips for your lawn - MSU Extension

However, since you’ve already applied fungicide without seeing improvement, it might be more likely that a fungal issue like Dollar Spot is the cause.

Additionally, ensuring your lawn receives adequate nutrition and following best practices for watering and mowing can help maintain its health and resilience against pests and diseases.

If you want to get a confirmed and precise identification of this diagnosis, you can send all your images by e-mail to the MSU Plant & Pest Diagnostics Lab. The experts there can also provide you with the best treatment options. Their email is <personal data hidden> - Please include your name – The lab will let you know if they need a sample sent. FYI – The lab may also ask for additional images.

Their website is at this link:

Plant & Pest Diagnostics (msu.edu)

Their Contact Information is at this link:

Contact Us - Plant & Pest Diagnostics (msu.edu)

This link will explain the details of submitting a sample to MSU Plant & Pest Diagnostics Lab:

Submit Samples - Plant & Pest Diagnostics (msu.edu)

I hope this helps!