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Disease Control Services

Eliminate Lawn-Damaging Diseases

with Proven Disease Control Treatments

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Disease Control for Lawns

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Say Goodbye to Brown Patch, Dollar Spot, Rust, and Other Lawn Diseases with Help from LawnWorks

Lawn diseases caused by fungal pathogens can quickly impact the health, color, and overall appearance of your turf. When left untreated, these issues can lead to thinning grass, dead patches, and expensive lawn repair.

Because lawn disease often looks similar to drought stress or insect damage, identifying the true cause is not always simple without professional experience.

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Lawn Disease Control Advice

Straight From Our Owner Josh Cull

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Lawn disease questions come up in almost every conversation we have with homeowners once the weather turns hot and humid.

 

So we sat down with LawnWorks Lawn Care owner Josh Cull and asked him directly: What should homeowners be doing about lawn disease, and what does LawnWorks do to help?

 

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What can homeowners do to prevent lawn disease?

“A lot of it for the homeowners is implementing proper cultural practices. So, proper watering, proper mowing, and thatch management.” -Josh Cull, owner of LawnWorks Lawn Care

Easy adjustments to prevent lawn diseases:
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LAWN IRRIGATION

Setting up your irrigation systems to water your grass.

Often, with irrigation systems, the irrigation company comes out to set up the programs, and they “set it and forget it”.

For example, many of them set it to water almost exclusively every other day; some have theirs set to water every day, and many water in the evening.

How should I water my grass?

To properly water your grass, our recommendation is deep, infrequent watering rather than daily watering. Basically, you want to water fewer times, but with greater volumes. Watering in the early mornings, rather than at night, also helps to reduce leaf wetness.

LAWN MOWING

What about mowing height? How short should I mow my grass?

Mowing height and using sharp blades help. If you mow with your old blades and they’re dull, it really tears and creates wounds in the turf plants, which makes them more susceptible to these fungal pathogens. To find proper mowing height this is a great resource: https://extension.illinois.edu/lawns/mowing-your-lawn and try not to cut more than a third off the grass leaf during a single mowing. This will help keep the lawn healthy too.

THATCH MANAGEMENT

I’ve mowed and watered properly; what else can I do for better lawn disease management?

The last thing is thatch management. Thatch kind of acts like a sponge and holds that moisture at the surface. All of these fungal pathogens are going to require a certain amount of moisture for a certain amount of time. So anything you can do to properly manage the level of moisture at the surface really helps to reduce lawn disease pressure.

If you still have lawn disease issues after implementing these best practices, call LawnWorks.

For people who seem to have chronic lawn problems year after year with specific diseases, we start to look at and recommend overseeding with newer varieties of turf that have better resistance to those pathogens.

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What does LawnWorks do to help with lawn disease control?

“One, we serve as a consultative service. The best success is when we have good communication with our customers. I always tell my customers, keep in mind, over the course of their typical lawn care program, we’re going to be on their lawn about once every six weeks, and a lot can happen in those six weeks.” – Josh

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We do provide training for our technicians; they’re trained to look for certain diseases, and we talk about that routinely throughout the year.

For example, it just started getting really hot and humid this summer, so we had a meeting. It was like, hey, we’re going to start seeing a lot of dollar spot, we’re going to see brown patch, these are things to be on the lookout for.

It helps when customers communicate with our lawn care company.

If you see something, say something. You don’t have to know what it is, but if something looks “off” in your lawn, let us know immediately. We’ll come out, take a look, and diagnose the lawn issue. It could be a disease, it could be an insect issue, or it could just be drought stress, maybe some summer dormancy. But I encourage good, timely communication.

Visible lawn diagnosis helps us manage your lawn care too.
At this point, what it takes is for one of our managers to actually get out and diagnose the issue in person. We have to evaluate the disease and determine, hey, what is our next course of action? Is a fungicide necessary? A lot of times it is. A lot of times it’s not, too.

We can go back to those cultural practices and talk to people and say, hey, what does your watering program look like? And if they’re watering at the wrong times of day, I say, hey, let’s do this first instead of putting products on.

Let’s see what you can do to reduce the pressure. If it doesn’t subside by then, then we can look at chemical options like a fungicide, and sometimes just fertility is needed.

Certain fungal infections thrive in low-nitrogen conditions. So if it’s been a while since the last fertilizer application, it’s like, hey, you do your part with the proper watering and proper mowing, we’ll get a little nitrogen on this, and sometimes that’ll help it grow out.

“So we use fungicides only if it’s necessary. It sounds odd because I’m in the business of applying chemicals, but I don’t like to apply something if it’s not needed.” ~ Josh Cull, owner

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Lawn Disease Control – At a Glance

The LawnWorks Lawn Disease Approach Simplified

Josh’s advice comes down to a clear lawn disease control philosophy:

1. Cultural practices first. Proper watering, proper mowing with sharp blades, and thatch management reduce disease pressure before any product is applied.

2. Trained eyes on your lawn. LawnWorks technicians are trained to spot diseases like dollar spot and brown patch, and the team meets regularly to stay ahead of seasonal disease conditions. But they are only out every six weeks or so, so timely communication from the customer is key.

3. If you see something, say something. You don’t have to diagnose it. If your lawn looks off, call LawnWorks and a manager will come out and diagnose the lawn issue.

4. Fungicides only when needed. LawnWorks evaluates every lawn disease case and recommends watering corrections, fertility, or fungicide treatment based on what the lawn actually needs.

Seeing brown patches, thinning spots, or anything that looks off in your lawn? Contact LawnWorks Lawn Care for a lawn disease diagnosis.

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Excellent Customer Experience with Treatments

“This was the first treatment of our lawn. The service provided was great! Daniel took the time to explain what he and his partner did that day and what to expect in the future treatments. I look forward to an excellent experience and future business Lawnworks!” Steve Mueller

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Your Questions Answered

Lawn Disease FAQs

How can I prevent lawn disease on my own?
Focus on three cultural practices: water deeply but infrequently in the early morning, mow at the proper height with sharp blades, and keep thatch under control. Together, these reduce the surface moisture and plant wounds that fungal diseases depend on.
When is the best time to water my lawn?
Early morning. As Josh Cull explains, you want to “water fewer times, but with greater volumes, watering in the early mornings as opposed to watering at night to reduce the amount of leaf wetness.” Evening watering leaves the grass wet overnight, which encourages fungal growth.
Does my irrigation system need adjusting?
Very possibly. Many homeowners have their system set to run every day or every other day, often in the evening. Those default schedules can promote disease. Deep, infrequent, early-morning cycles are usually healthier for the lawn.
Why do sharp mower blades matter for disease?
Dull blades tear the grass rather than cutting it cleanly. As Josh puts it, that “creates a wound on the turf plants, which makes them more susceptible to some of these fungal pathogens to enter.” Sharp blades leave a clean cut that heals faster.
What is thatch and why does it matter?
Thatch is the layer of dead material at the base of your lawn. It “acts like a sponge and holds that moisture at the surface,” according to Josh, and since fungal pathogens need moisture to thrive, managing thatch is a key way to reduce disease pressure.
I have the same lawn disease every year. What can I do?
For chronic, recurring problems, LawnWorks may recommend overseeding with newer turf varieties that have better built-in resistance to the pathogens affecting your lawn.
How often will LawnWorks be on my lawn?
A typical program brings a technician to your property about once every six weeks. Because a lot can happen between visits, homeowner communication is an important part of catching problems early.
What should I do if I notice something wrong between visits?
Contact us right away. In Josh’s words: “If you see something, say something. You don’t have to know what it is, but if something looks off, let us know immediately.” A manager will come out to take a look and diagnose the issue.
Is it definitely a disease if my lawn looks bad?
Not necessarily. What looks like lawn disease can also be an insect issue, drought stress, or summer dormancy. That’s why we diagnose in person before recommending any treatment.
Will you always apply a fungicide?
No. We evaluate each situation first. Sometimes a fungicide is necessary, and sometimes it isn’t; often correcting watering, mowing, or fertility resolves the problem. As Josh says, “I don’t like to apply something if it’s not needed.”
Can fertilizer help with lawn disease?
Sometimes. Certain fungal infections thrive in low-nitrogen conditions, so if it’s been a while since your last fertilizer application, adding nitrogen can help the lawn grow out of the problem.
Is fungicide treatment safe for my kids and pets?
Yes. LawnWorks only applies a fungicide when it is truly needed, and we ask that you keep children and pets off the lawn until the treatment has fully dried, usually a couple of hours. Your technician will tell you the exact re-entry time for your application.
Will my lawn recover from disease, or is the damage permanent?
It depends on the disease and how far it has progressed. Many lawns bounce back once the fungal pressure is corrected through watering changes, fertility, and a fungicide when warranted. Grass that a disease has fully killed will not regrow on its own, so for those areas we recommend overseeding with disease-resistant varieties to fill the dead patches back in.
Is lawn disease contagious, and will it spread to the rest of my yard?
It can. Many fungal diseases spread through water, foot traffic, and mowing equipment, and the spores move on wind and shoes. That is why early detection matters: the sooner we diagnose the lawn disease and reduce the surface moisture it needs, the less it spreads.
Is lawn disease control included in my lawn care program, or is it an extra charge?
Diagnosis is part of the consultative service built into your regular program, so a manager will come out and evaluate the issue at no extra cost. A curative fungicide application is only added when the lawn actually needs one, and we will always discuss it with you first.
What time of year does lawn disease show up in Illinois?
It varies by disease. Dollar spot and brown patch are most active in the hot, humid stretch of summer, while pink snow mold and gray snow mold develop under snow cover in winter. Red thread, leaf spot, and others favor their own conditions, which is why a trained technician watches for the right disease at the right time of year.
Do you provide lawn disease control in my area?
LawnWorks Lawn Care provides lawn disease control and treatment across the Chicago suburbs, including Joliet, Crest Hill, Naperville, Aurora, Bolingbrook, Plainfield, and surrounding Illinois communities. Call 815-723-8760 to confirm service at your address.
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Are lawn diseases damaging your lawn?

At LawnWorks Lawn Care, we help homeowners in Illinois diagnose and manage lawn disease with the right combination of lawn care expertise, disease treatments, and prevention. Our lawn care team understands how to identify common turf diseases, determine the cause, and recommend the most effective solution for any lawn disease.

Not all lawn diseases develop the same way or affect turf in the same areas. Some target the grass blades, while others attack the roots and surrounding soil. Certain diseases are more likely to appear in specific turf varieties, and weather also plays a major role: some thrive in cool, damp conditions, while others become active during heat and humidity. Accurate identification is the foundation of effective lawn disease control.

For lawn disease to develop, three factors must be present: a disease-causing pathogen, a lawn that is vulnerable to infection, and environmental conditions that allow the disease to spread. This is often called the lawn disease triangle. Understanding these three factors helps guide the best treatment and prevention plan.

Lawn Diseases

Dollar Spot

Dollar spot causes small, silver-dollar-sized patches in the lawn and is most common during warm, humid weather when turf is stressed or low in nitrogen.

Brown Patch
Brown patch creates large, circular areas of brown or thinning grass, especially during hot, humid weather and extended periods of moisture.
Ascochyta Leaf Blight

Ascochyta leaf blight can quickly turn grass blades pale or straw-colored, often during periods of heat stress or inconsistent watering.

Fairy Ring

Fairy ring appears as dark green circles or arcs in the lawn and may include mushrooms or dry areas that are difficult to water.

Leaf Spot
Leaf spot causes small, dark spots on grass blades that can weaken the lawn and lead to thinning turf over time.
Pink Snow Mold
Pink snow mold develops under snow cover and shows up in early spring as light pink or reddish patches on matted grass.
Red Thread

Red thread produces reddish or pink thread-like strands on grass blades and often appears in mild, damp conditions when lawns are low in nitrogen.

Summer Patch

Summer patch damages turf roots during hot summer weather, causing circular areas of thinning or dying grass.

Grey Leaf Spot
Gray leaf spot is a common fungal disease that attacks turfgrass, caused by pathogens like Pyricularia grisea or Pyricularia oryzae. It thrives in warm, humid weather and long periods of leaf wetness, turning healthy green lawns into thin, brown, scorched-looking patches.
Rust
Rust is a fungal pathogen that infects turf and is named for the orange-red spores it produces, which spread readily with wind, rain, and traffic. It is most common late summer through fall in slow growing turf.

Our Proven Approach to Lawn Disease Control

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When lawn disease becomes severe or conditions allow it to spread quickly, fungicide treatments may be needed to help prevent significant turf damage. In those situations, LawnWorks Lawn Care can accurately diagnose the issue and apply the right treatment for your lawn.

We also help you reduce the risk of future outbreaks by recommending better lawn care practices and, when needed, suggesting overseeding options that support a healthier, more resilient lawn.

If your lawn is showing signs of disease, LawnWorks Lawn Care is here to help. Our lawn care team provides knowledgeable lawn disease diagnosis and treatment services for Illinois lawns, helping protect your turf and keep it healthy, green, and looking its best.

At LawnWorks Lawn Care, we follow an integrated lawn care approach to battle lawn disease.

We often look to improve lawn conditions and reduce lawn stress to help prevent disease from developing or returning.

Strong lawn care habits are one of the best defenses against disease. Healthy turf is better able to resist infection and recover when problems occur. Important cultural practices include:

Proper Watering:

Many lawn diseases thrive when grass stays wet for too long. Watering early in the morning instead of at night helps grass dry more quickly and reduces the risk of fungal growth. Deep, infrequent watering is generally better than frequent shallow watering that keeps the surface damp.

Good drainage and aeration:

Compacted soil, poor drainage, and excess thatch can create favorable conditions for disease. Improving airflow in the soil and helping water move through the root zone can reduce disease pressu

Smart mowing practices:

Avoid mowing when heavy dew is present, and keep mower blades sharp. This helps reduce stress on the grass and limits the spread of certain lawn diseases.

Balanced lawn nutrition:

Proper fertilization supports turf health and recovery. Applying the right nutrients at the right time can help strengthen the lawn and reduce its susceptibility to disease.

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