edocr - 2025 turf fungicide resistance chart

Turf fungicides are used to control diseases such as dollar spot, brown patch, and fairy ring. The same principles of disease control apply to both professional turf managers and home lawn owners. However, the overuse or improper use of fungicides can lead to fungicide resistance in fungal populations.

By rotating fungicides with different fungicide mode of action groups, using fungicides in combination, and using cultural practices to reduce fungal populations you can manage this. Cultural practices include irrigation management, fertilization, mowing, and aeration.

Fungicide Rotation.

You can use a strategy of fungicide rotation to manage fungicide resistance. This is when you use different fungicide mode of action groups to prevent the build-up of resistance in fungal populations. The IGFH Guide to Australian Turf pesticides goes into more detail on this topic but the following is a summary.

1. Understand what this table is for:

The turf fungicide mode of action table provides information about different groups or classes of fungicides. It helps turf managers, turf agronomists, and lawn owners select and rotate fungicides to prevent or manage fungal diseases. For example products like ProForce Shrapnel, Segway and Solitaireare specific for Pythium.

Products like AzoForce 250, ProForce Squadron and Lexicon Intrinsic are more general fungicides.

2. Identify the columns:

Familiarize yourself with the table’s column headings. Each column provides information about these turf fungicides and their properties.

3. What does each column mean?

Here’s what each column represents:

FRAC Resistance Group: Fungicides are put into Groups or classes based on their modes of action;

Fungicide active ingredient: What is actually in it;

Product name: Lists some examples of common turf fungicides;

Mode of Action: Describes the specific process that the fungicide affects in the target organism.

Diseases controlled: Specifies the fungal diseases that you can use the turf fungicides for in Australia.

4. Determine target disease:

Identify the fungal disease you are dealing with. This useful turf disease guide helps with this.

5. Choose the appropriate group or class:

Look for the group or class of fungicides that are effective against your target disease. Cross-reference the fungicide group or class with the target disease column to find suitable options.

6. Rotate fungicides:

It is crucial to rotate fungicides with different modes of action to prevent fungal resistance. Refer to the mode of action column to select a fungicide from a different group or class for future applications.

7. Follow the label:

Once you have identified a suitable fungicide, read the product label and follow the manufacturer’s application rates, timing, and safety precautions. This advice also relates to whether it is legal to use a specific fungicide in a home lawn situation.

8. Monitor and assess efficacy:

After applying the fungicide, monitor the treated turf for disease control and evaluate how well your selected fungicide works. If necessary, consult with local turf agronomists or sports turf consultants for further guidance.

About Gilba Solutions

Gilba Solutions Pty Ltd are Sydney based independent sports turf consultants and turfgrass agronomists. We operate in Sydney, NSW, and the ACT.

Jerry Spencer has written over 100 articles & a book on turf nutrition. These are on topics ranging from turf fertilisers & aquatic weed management to using turf pigments & why turf herbicides sometimes don’t work. He also publishes a turf blog.

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