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Fungus In Grass St Augustine

Scotts Diseaseex Lawn Fungicide Fungus Control Fast Acting

Fungus or Grub Damage? | Pro Turf Lawn Service

Scotts DiseaseEx Lawn Fungicide works on 26 typical lawn diseases like red threads, brown patches, and powdery mildew. According to Scotts, this fungicide starts to work just 24 hours after application.

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The fungicide works in a preventative way if you use it on your St Augustine lawn to control brown spots before they appear. And in a curative way, apply it on your St Augustine lawn to treat signs of disease.

For best results, start applying it before you see the symptoms as a preventative measure. Another great thing about this fungicide is that it covers a large area. A 10-lb. bag is enough to treat up to a 5,000 square feet area.


  • Stops and prevents more than 25 lawn diseases.
  • Large area coverage a 10 lb is enough for up to 5,000 sq. ft area.
  • Works both in preventative and curative ways.


  • It doesnt work well on grubs or mushrooms.

Apply Azoxystrobin To Kill Fairy Ring Fungi

If you notice your lawn showing symptoms such as a circular pattern of mushrooms, overgrown grass or dead grass, you need to treat fairy ring disease. The best treatment is to spray anti- fairy ring fungicides like azoxystrobin and flutolanil on your infected lawn.

Another great alternative to get rid of this type of lawn fungus is Consan 20, an indoor and outdoor fungicide and disinfectant.

How Do You Get Rid Of Grass Fungus

Getting rid of grass fungus can be a tricky process, depending on the type of fungus. Generally, the first step is to assess the level of damage and determine what type of fungus is present. Common types of fungus that affect grass include Red Thread, Dollar Spot and Brown Patch.

Once you have identified the type of fungus, there are a variety of treatments available. Cultural practices, such as watering deeply but infrequently, can help reduce the occurrence and damage caused by some types of fungus.

Additionally, fungicides and preventive treatments can be used to help control the spread of certain types of fungus. Fungicides can be applied in liquid or granular form, and may also be combined with preventive treatments.

Finally, it is important to remember that it may take multiple treatments over a period of time to eliminate a fungal issue. Additionally, it is important to create a good maintenance phase following treatment.

This includes mowing the grass at the proper frequency and height and fertilizing to encourage the healthy growth of the grass.

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Common St Augustine Grass Diseases

St. Augustine grass is highly vulnerable to fungal diseases. The main types of fungi that tend to cause problems in St. Augustine lawns include take-all root rot fungi, brown patch fungi, gray leaf spot fungi, fairy ring fungi, and nigrospora stolon rot fungi.

Each of these fungal diseases is discussed further below:

Peak Season For St Augustine Grass

Lawn Doctor, Katy Texas (TX)

The peak season for St. Augustine grass is during the summer months while temperatures stay between 75 degrees and 90 degrees Fahrenheit.

It has comparatively high drought tolerance and maintains a deep green color longer than other warm-season grasses.

However, St. Augustine does go dormant during drought season. Its tolerance for the cold behaves similarly.

St. Augustine grass maintains its green color longer than other warm season grasses, though it cannot withstand extended cold periods.

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St Augustinegrass Fungi And Treatments

St. Augustinegrass is susceptible to a number of common fungi. Treatment for many fungal infections may simply require removing infected areas in conjunction with preventive steps to help keep the infection from spreading to the rest of the lawn. Fungicides are also available if all else fails.

Fairy ring appears as a ring or semicircle of dark-green grass with one or possibly more additional rings of dead grass inside or outside the green patch. To treat the condition, remove the soil where any mushrooms or white, woolly masses appear to 12 inches deep and 2 feet past the outer circumference of the ring. Refill the hole with fresh soil and add new seed or sod to the area. Help prevent fairy ring by fertilizing the lawn with sufficient nitrogen, dethatching, aerating the soil and watering the aerated area heavily for two to three days. Fungicides for fairy ring contain active ingredients such as azoxystrobin or flutolanil.

Gray leaf spot produces irregular dead patches of turf with bleached-out spots here and there. It typically occurs when the temperature and humidity are high or as a consequence of overwatering or overfertilizing. Preventing the fungus by cutting back on water and fertilizer is a more effective technique than the fungicides that are available. If you choose to use a fungicide, look for one containing azoxystrobin, azoxystrobin with propiconazole, or thiophanate-methyl.

Does This Fungicide Treat The Problem

Many common lawn diseases can turn your beautiful lawn into a living nightmare. Among them are brown patches, red threads, powdery mildew, rust, snow mold, etc. But all diseases dont affect your lawn the same way.

For example, brown patches are more likely to affect some Augustine grasses like Zoysia and Bermuda grass. The occurring rate of brown patches in these two types of grass is more compared to other fungal diseases. In most cases, a good-quality fungicide will help your lawn fight brown patches. However, checking before buying is always recommended and an intelligent thing to do.

Key Takeaway: before buying any fungicide, you should diagnose your lawn and find out what is causing the thriving lawn to turn into a disaster. After finding out the reason behind it, its time to check the fungicide label to make sure it can treat your lawn problem.

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Why Do I Have Brown Spots In My St Augustine Grass

Brown spots in your St. Augustine grass could mean there are a few different issues. It may be caused by drought, a fungal disease, chinch bugs, or an infestation of a pest known as the Southern and Florida Chinch bug.

The first step to determine what is causing your brown spots is to inspect the area of affected grass. If the brown spots are small and evenly dispersed it could be symptomatic of chinch bug infestations or drought.

If the spots are larger and not uniform, this may be symptomatic of a fungal disease.

If drought is the cause, ensure that the area in question is getting watered routinely with the appropriate amount of water, as too much or too little can both lead to brown spots. In the case of a chinch bug infestation, you will see the small pests and their white egg sacs on the grass in addition to the discoloration.

You can treat this infestation with insecticides and removing dead grass. Lastly, if it is a turf disease, it is best to contact a lawn care specialist who will be able to diagnose your specific problem and find the right treatment for your grass.

St Augustine Lawn Fungus Can Be Controlled

St. Augustine Grass Seed!!!!!!

If you have lawn fungus in your St. Augustine grass, you might feel like throwing in the towel. Dont panic when you see those thin, brown patches creeping into your yard because as annoying and lawn devastating as lawn fungus can be, it actually can be treated and controlled!

There are several ways you can treat your lawn to inhibit the spread of lawn fungus, as well as stop lawn fungus that is already infecting your grass. The two biggest factors here are having timely applications of a good fungicide and ensuring that your lawn is being properly watered. Seems simple enough, right? It can be! However, it does take some effort and expertise to figure out exactly which fungicide is best for your St Augustine lawn. You need to find the right balance of water to keep your grass green and lush without overdoing it.

When given proper attention, water, and treatments, your lawn will thrive! There are things that you can do yourself to figure out what could be causing the fungus you see affecting your lawn. There are also treatment programs that you can have a professional lawn care company come out and apply for you. Before we look at preventive measures, lets look at common causes of fungus you see in your St. Augustine grass!

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Best Fungicides For St Augustine Grass

Among the most common fungal infections are brown patch, take-all root rot, gray leaf spot, and downy mildew. St Augustine grass disease identification is not difficult: you will definitely notice that your lawn has changed its color in some places. It is crucial to start using fungicides right away to prevent spreading.

Apply A Lawn Fungicide

The most effective way to get rid of fungus in St. Augustine grass is applying a lawn fungicide such as Scotts DiseaseEx or Cosan 20. Apply the treatment at the onset of the disease to treat and prevent brown patches in your lawn. Repeat treatments may be necessary if the disease is advanced.

Since the fungus in St. Augustine grass may be caused by different types of fungi, some fungicides may be more effective on some strains of the brown patch disease than others. Examples of effective fungicides include Azoxystrobin, Pyraclostrobin, and Fluoxastrobin.

Here are the best fungicides for brown patch disease in St. Augustine grass lawns:

Cleary 3336F Fungicide Brown patch

Youll want to avoid using any of these products exclusively in the long run, as gray leaf spot fungi usually grow resistant to them. A good idea would be to alternate them.

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Treat Brown Patch Disease

Brown patch disease is a fungus that affects lawns when they remain wet for prolonged periods. If not prevented and treated on time, your lawn will develop brown patches of dead grass that might be difficult to revive.

As soon as you see signs of brown patch disease in St. Augustine grass, start applying an Azoxystrobin fungicide such as Scotts DiseaseEx or Syngenta Heritage G thatll kill the fungus and revive your lawn.

Heres a great video on how to treat brown patch disease and get St. Augustine grass to grow back greener.

  • St. Augustinegrass Yearly Maintenance Program
  • University of Maryland Extension:

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Types Of Fungus In St Augustine Grass

Calvin Finch: Hot

St. Augustine grass fungus disease is generally referred to as brown patch disease, but thats just one type of fungal diseases that affects most warm-season turfgrasses. Most lawn fungal infections eventually manifest as visible patches of brown discoloration in lawns, hence the name.

Here are the different types of fungus that can affect St. Augustine grass:

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Can Grass Recover From Fungus

Yes, grass can recover from fungus. The best way to ensure that your grass recovers is to act quickly and diligently. Fungal diseases can spread quickly if not addressed immediately, so its important to identify the disease and implement a plan as soon as possible.

Cultural practices like proper mowing, fertilizing, and watering can help prevent fungal diseases, but there are treatments available if they do occur. Fungicides are the most common form of treatment, and they can be applied as a foliar spray, soil drench, or granular application, depending on the type of fungus present.

Make sure to read and follow label instructions, especially when using a chemical fungicide, as improper use can lead to more damage to your lawn. Once the application is complete, the grass may take several weeks to show signs of recovery.

Continue to follow good cultural practices and monitor the grass for signs of further fungus. Regular aeration and overseeding can also help grass recover from fungus by improving the soil structure and providing a healthy environment for regrowth.

It is important to note that recovering from a fungal infection can take time, but with the proper care and attention, your grass will be back to its healthy and lush state soon.

Coping With St Augustine

Im a big fan of St. Augustine. Its a handsome grass that many of us love. But, it does have its issues, and as a group they constitute some of the most commonly asked questions I encounter.

Diagnosing St. Augustine woes is extremely difficult without actually being on the lawn looking at it first-hand. Even then, it can be confusing, even to professionals. Several issues may get stirred into the mix enough so that its hard to decide which specific problem caused the grass the biggest challenge. Im going to mention all I can think of, and Ill let you work at diagnosing the problem yourself.

St. Augustine in the shaded Sperry landscape eventually was replaced with shade-tolerant groundcover.

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Does St Augustine Get Fungus

Fungus is a general term for any kind of eukaryotic microorganism that lacks chlorophyll. This includes yeasts, molds, and mildews. While there are many types of fungi, not all of them cause disease. Some fungi are actually beneficial, such as those used in the production of beer, wine, and cheese. However, some fungi can cause disease in humans, animals, and plants.

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Is It Granular Or Liquid

St Augustine Grass Tips // How I Get My St Augustine So Thick and Green

This depends on your preferences. There are plenty of fungicides out there from both sides, granular and liquid. The working principle will be different for both types.

If you are comfortable with granular fertilization, you can skip the liquid ones. But if you want something that can be done with less hassle, you can choose liquid fungicide.

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Best For Diseases Prevention: Scotts Grubex1

Affiliate links and images placed from the Amazon Product Advertising API on 2022-11-22

Brown spots in St Augustine grass can appear not only due to fungus but also because of the activity of damaging pests. Scotts GrubEx1 is capable of handling them. The key to success is a timely application: treat your lawn in late spring, and you will protect it from insects for four months in advance. One 28.85-pounds package is enough to process 10000 square feet of a lawn.

The main ingredient in this product is Chlorantraniliprole. It has a paralytic effect on insects and kills them within 2-4 days. Although the maximum efficiency is observed precisely on eggs and larvae, it affects pests at any development stage. It is not washed off with water and stays active even after heavy rain.

  • A spreader is required for the uniform application.

How To Know What Fungicide To Use For St Augustine Grass

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St. Augustine grass gives your lawn a soft feel with a pleasant blue-green color. Grown for its shade and salt tolerance, St. Augustine grass comes with a few potential problems as well, including susceptibility to some common fungal diseases. Identifying the fungal disease is key to choosing the right fungicide.

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Brown Patch Fungus Active In St Augustine Grass Lawns

October 26, 2005 by cmwood

Brown Patch Fungus Active in St. Augustine Grass Lawns

The day/night temperatures the past few weeks have favored development of the turfgrass fungal disease called Brown Patch. This disease of lawns is caused by a fungal pathogen, which has the scientific name of Rhizoctonia solani. Turfgrass affected by brown patch generally will exhibit circular or irregular patches of light brown, thinned grass. Under conditions that favor this disease, these patches can coalesce increasing the size of the affected area. Understanding this disease, which is all too common in the fall on St. Augustine grass, includes the following.

How it looks and conditions that encourage development.

What can be done to minimize Brown Patch?

  • Water infrequently, only as necessary to prevent wilt. Water early in the day to remove dew and allow the grass to dry quickly.
  • Avoid over fertilization in spring and fall.
  • Improve the lawn health and correct poorly drained areas to reduce damage caused by brown patch.
  • Fungicides to control Brown Patch are available to the home consumer at most garden centers. These products are most effective when used on a preventive basis . Multiple applications may be necessary. Always follow pesticide label directions.

What to expect this fall, winter and next spring?

David Chalmers, State Extension Turfgrass Specialist, Texas Cooperative Extension

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Great Professional Service And Knowledgeable Technicians

Brown Patch Fungus St Augustine Grass

Great professional service and knowledgeable technicians. I had a concern re some brown areas and possible grub infestation. They spent a considerable amount of time and effort trying to understand the issue, they looked at water coverage by sprinklers, they showed me how the existing grass was not easily pulled out, and then proceeded to do the pest control, weed control and fertilization. They were sensitive to my dogs, and wanted them inside to prevent them. From inhaling the fumes. They then wiped down the pool cage with a pesticide. I have had a similar service with Arrow, and their service was nothing like this.

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What Ingredients Does It Contain

You cant just apply any fungicide that you find close at hand. You need to apply a fungicide that is safe for the grass itself, you, and the environment.

So, first, take a look at the ingredients. Make sure the fungicide contains non-toxic materials and sulfur. For better results on your St. Augustine grass lawn, look for fungicides that come with rosemary oil, neem oil, and jojoba oil.


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