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Are you a gardener who is looking for the best lawn fungicide to use in your garden in 2022? 

If so, you’re in luck! In this blog post, I will share with you five of the best lawn fungicides on the market right now. I will also provide you with some helpful tips on how to make a choice when it comes to deciding which one is right for your needs.

But if you do not know what is a fungicide, let me explain you in a few words. 

Best Lawn Fungicides

A fungicide is a type of pesticide used to kill the fungus or prevent its growth on lawns, trees, shrubs, flowers, vegetables, and fruits.

Application Method

The application method is the means by which a lawn fungicide is applied. Most fungicides are liquids that are sprayed onto the leaves of grassy plants, but some dust or granules may be used as well. Each type has its advantages and disadvantages

Mode of Action & Spectrum

Each fungicide works a little differently to kill off the fungus. The way it works is called its “mode of action.” By understanding the mode of action, you are better able to select a fungicide that will be effective against whatever fungus or mold is bothering your lawn.

Types of Fungicides

Following are the types of fungicides.

1. Contact Fungicides

These fungicides are usually absorbed through green plant tissue. They prevent the further growth of fungus by disrupting essential cell functions within the pathogen.

2. Systemic Fungicides

These fungicides are absorbed by the leaves of plants and transported to all parts of the plant. They kill fungi in different ways depending on their mode of action, but they are most effective when applied preventatively before a fungal problem is evident.

3. Preventative Fungicides

Preventative fungicides control diseases before they appear. They do this by stopping the formation of fungus spores before they can germinate and infect your lawn. Most preventative fungicides are systemic, which means they are absorbed through a plant’s leaves and delivered to the roots, stems, flowers, fruit, or wherever else fungus may be growing.

Top 5 Lawn Fungicides

01. Scotts GrubEx1 – Grub Killer for Lawns

Scotts GrubEx1 is the easy and effective way to get rid of grubs and keep them from coming back. Just one application in the spring or early summer will kill grubs for four months, and help prevent root damage caused by insects. So if you’re looking for a lawn that’s healthy and vigorous, look no further than Scotts GrubEx1.

This powerful grub killer prevents turf damage by killing grubs when they are young. Plus, it kills 25 percent more types of grubs than the original GrubEx formula – so you can be sure to get the job done right. This powerful formula is specifically designed to kill grubs and prevent them from wreaking havoc on your turf. It is the easiest way to control grubs all season long.

I found this to be an overall great grub killer because it kills many types of grubs and effectively prevents them from coming back. It requires 2 applications, which is a slight drawback for this product and others that require only one application. I also liked the price point for this Scotts product because it can be bought in bulk and treated up to 10,000 sq. ft., which is great for bigger yards or properties with many lawns to fertilize and/or spray.

Pros

  • Kills many types of grubs
  • Prevents future damage

Cons

  • Requires 2 applications

02. Dow AgroSciences 173917 Eagle Fungicide

Dow AgroSciences 173917 Eagle 20EW Fungicide is the perfect solution to your fungal disease problems. It prevents and controls more than 15 different types of fungi, and it’s well-tolerated by both popular turf and ornamental species. It is a systemic fungicide that works to protect new growth from the Dollar spot, Brown patch, Anthracnose, Spring dead spot, Necrotic ring spot, Red thread, Leaf spot, Powdery mildew. Rusts and Zoysia large patch.

Dow AgroSciences 173917 Eagle 20EW Fungicide is “The One” for all your fungal needs. It eradicates a broad spectrum of pathogens, including brown patch and dollar spot, with just one application. Eagle 20EW also contains a built-in colorant that makes it easy to see where you’ve sprayed, so there’s no need to worry about missed spots. Turfgrass and ornamental growers everywhere rely on Eagle 20EW to provide beautiful landscapes and healthy crops.

I like this product because it is easy to see where you’ve sprayed and provided maximum eradication of fungus.

Pros

  •  Kills many kinds of fungi.
  • Easy to see where it has been applied.
  • Long-lasting protection.

Cons

  • Requires special caution when applying.

03. BIOADVANCED 701270A Effective Fungicide

BIOADVANCED 701270A Fungicide is a powerful fungicide that cures and prevents listed lawn diseases. This powerful fungicide is specially formulated to control red thread, brown patch, dollar spot, rust, and other listed diseases.

It offers lawn the rainproof protection it needs to stay healthy and green all season long.

This systemic fungicide is absorbed by grass, so it won’t wash off no matter how much rain you get. Plus, it treats up to 5,000 sq ft – enough for even the biggest lawns. Keep your lawn looking great with BIOADVANCED 701270A fungicide.

I think this one is the best for me. It has a good price, and it works well for my lawn. Also, it can be used on all types of grasses and the grass doesn’t die.

Pros

  • The price is good

  •  It protects from a lot of diseases, not just one.

Cons

  • I think it could have worked better if there was a bigger bottle for this price.

04. Scotts DiseaseEx Lawn Fungicide

The Scotts DiseaseEx is a product that will help homeowners in protecting and maintain their lawn in a very effective manner. The Scotts DiseaseEx Lawn Fungicide is known to deliver visible results within 24 hours of application and can treat an area of up to 5,000 square feet. Scotts DiseaseEx is a fast-acting fungicide that stops and prevents 26 common lawn diseases. It’s preventative when used on lawns to control brown spots and rings before they appear, and curative when applied on lawns showing signs of disease. This product cures 26 types of lawn diseases, making it a great choice for anyone with a green thumb.

The Scotts DiseaseEx is also known for its superior protection against diseases such as brown patches, Pythium blight, and Dollar Spot. The fungicide is also very easy to use for both professionals and homeowners due to its simple application process. Furthermore, this product contains sulfate that can quickly penetrate through the grasses’ leaves thus making it more effective in killing the fungi.

I have used this product in my yard. I have seen a huge improvement on my lawn since then. The grass is greener and the growth had improved significantly.

Pros

  • Fast-acting
  • Curative and preventative protection
  • Treats up to 5,000 square feet
  • One application lasts for 24 months

Cons

  • Not available in all states

05. Spectracide Immunox Fungus Plus Insect Control

The Spectracide Immunox Fungicide is one of the best lawn fungicides on the market. It is a mixture of insect and fungicide which helps to destroy any insects and fungus that can damage and deteriorate your grass.

This powerful formula kills harmful insects on contact while preventing and controlling black spots, brown patches, rust, powdery mildew, and other major lawn diseases. Immunox Fungicide is also safe for pets and children – so you can enjoy a healthy, green lawn without any worries. The Spectracide Immunox powerful product can treat up to 2,500 square feet, and features an easy-to-use flip sprayer. Plus, it’s rainproof in hours, so you can rest assured that your lawn will be treated properly.

If you want a product that is 100% safe for your family and pets, then this may be the one for you; it has no strong chemical smells nor does it irritate the skin.

Pros

  • Kills harmful insects on contact
  • Prevents and controls major lawn diseases
  • Treats 2,500 square feet
  • Rainproof in hours

Cons

  • Not strong enough for severe problems or treatment of large areas (more than 2,500 square feet)

Types of Fungus

If you have a fungus problem in your yard, it may be difficult to know exactly what type of fungus you are dealing with.

Microsphaera Penetrans

Microsphaera penetrans is a fungus that can infect most warm-climate grasses including Bermuda, St Augustine, and Zoysia. This fungus causes brown patch disease in the lawn.

Cordana Flora

Cordana floria is another fungus that infects most warm-climate grasses. This fungus causes patch disease in the lawn.

Pythium Blight

Pythium blight is a very common fungal infection of lawns, but can be found anywhere there is water present for an extended period of time. This fungus causes brown patch disease.

Powdery Mildew

Powdery mildew affects most cool-season grasses like bluegrass, ryegrass, and fescue. It is caused by the pathogen Uncinula nematodea which forms spores that are easily spread by wind or water to infect new plants. This can be a big problem in the fall months.

Bentgrass Yellow Patch

Bentgrass yellow patch is caused by another pathogen called Pyricularia grisea. This fungus infects only bentgrass species of grasses, but may also affect some turf-type tall fescues as well. There are no fungicides labeled for this fungus at this time.

Causes of Lawn Fungal Diseases

Fungi can enter your lawn in a variety of ways. The most common method is through the soil, but insects and water may also spread fungi to your grass.

Lawn Fungus Diseases Spread by Insects

Cutworms are the larvae of certain moths that feed on grassroots. The damage they cause looks like dead patches.

Lawn Fungus Diseases Spread by Water

Water often spreads fungus to plants. It also provides the moisture that allows the fungus to grow and spread in many cases.

Tips for Using Fungicides

There are several ways to treat a lawn with fungicides, but most consumers choose to spray the product on the leaves of their grassy plants. Here are some tips for using lawn fungicide sprays:

  • Do not apply when the weather is excessively windy or humid as it may reduce treatment effectiveness.
  • Water the lawn at least 24 hours before spraying, but not more than 48 hours before.
  • This gives time for foliage to absorb moisture and makes it easier for the product to stick to leaves.
  • Make sure the spray is mixed according to label instructions, especially if using more than one application per year.
  • Adjust the nozzle of your hose to apply the right amount of spray needed for your yard.
  • This will help prevent wasting money on too much or too little product.
  • Keep pets and people off the lawn until the application has dried completely, usually within two hours.
  • A fungicide will not work if it is washed away immediately after treatment.
  • Do not mow or water the lawn for at least 48 hours after treatment.
  • This gives the product time to work and will prevent damage to treated areas of grass.
  • Inspect your yard regularly for signs of fungus or disease, especially after periods of rain or watering that may have extended beyond what is necessary for plant health.
  • Consult your local county extension service for more information on how to identify the fungus in your lawn and the best way to treat it.
  • Research fungicides at your state’s department of agriculture or equivalent website.

FAQs

What is lawn fungicide?

A fungicide can be applied to kill fungus or fungi on the surface lawn, which often occurs due to insufficient water drainage after rainfalls. In this case, it may be necessary to patch the lawn area with a new type of grass.

What is the difference between a herbicide and a pesticide?

Pesticide and herbicides are types of biocides (also called “biological pesticides” or “botanical pesticides”), which kill pests in agriculture and gardens. The term pesticide may also be used to refer to both these categories, as well as to chemical pesticides which are a subgroup of pesticides that have undergone more precise and complex manufacturing processes.

What chemical ingredients are used in lawn fungicides?

Chemical fungicide for lawns can kill fungal spores that cause disease and provide the plant with resistance to fungi. In general, there are many types of active chemicals that can be found in fungicides. The most common groups of these chemicals include:

1. Sulfur compounds kill fungi by making the cell membranes of the fungus permeable.

2. Nitrogen-containing fungicide that can inhibit enzymes and interfere with important processes such as photosynthesis, which causes death.

3. Copper compounds that play a role in stopping the growth of fungal spores and sporangia.

4. Organophosphate and carbamate insecticides that can prevent the growth of fungi by inhibiting cholinesterase, an enzyme that is needed for normal nerve impulse transmission in humans and some microorganisms.

5. Pyrethroid compounds that interfere with the nerve impulses of insects and cause paralysis.

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