When it comes to keeping your lawn healthy and free from damaging diseases, azoxystrobin is a standout fungicide trusted by both professionals and DIY lawn enthusiasts. Whether you’re looking to prevent problems before they start or tackle an active outbreak, understanding how and when to use azoxystrobin can make all the difference in your lawn care results. Here’s what you need to know.
What Is Azoxystrobin?
Azoxystrobin is a systemic, broad-spectrum fungicide that protects against a wide range of lawn diseases. It’s the active ingredient in products like Scotts DiseaseEx (granular) and the Lawn Care Nut’s Azoxystrobin (Azoxy) 2SC Select (liquid concentrate). Azoxystrobin works by disrupting the energy production of fungal pathogens, stopping their growth and spread both in the soil and on the grass blades.
What Diseases Does Azoxystrobin Control?
Azoxystrobin is especially effective against:
- Brown Patch & Large Patch: These common diseases cause unsightly brown or yellow circles in both cool- and warm-season lawns.
- Leaf Spot: Manifests as small, dark lesions on grass blades that can merge and thin out turf.
- Other Soil-Borne and Foliar Diseases: Azoxystrobin’s broad action makes it a versatile choice for many common lawn issues.
Note: Azoxystrobin is NOT recommended for dollar spot disease. For dollar spot, propiconazole is a better choice.
When Should You Apply Azoxystrobin?
Timing is crucial for effective disease management:
- Preventative Applications: Apply azoxystrobin before disease symptoms appear, especially during periods of warm, humid, or wet weather when fungal activity is likely.
- Curative Applications: If you notice early signs of disease (such as brown patches or thinning grass), azoxystrobin can help stop the spread and aid recovery.
Cool-Season Lawns: (Kentucky Bluegrass, Tall Fescue, Ryegrass)
Apply in late spring and early summer, or whenever brown patch and leaf spot are most active.
Warm-Season Lawns: (Bermuda, St. Augustine, Zoysia, Centipede, Bahia)
Apply in spring and summer, especially during periods of high humidity or after heavy rains.
How to Apply Azoxystrobin
- Choose the Right Formulation: Azoxystrobin (Azoxy) 2SC Select is a professional-grade liquid concentrate for maximum coverage and effectiveness.
- Mixing: For prevention, use 0.38 oz per 1,000 sq ft; for curative treatment, use 0.77 oz per 1,000 sq ft. Mix with 2–4 gallons of water in a battery or pump sprayer.
- Application Method: Spray evenly across the lawn. Do not use a hose-end sprayer, as it does not provide the necessary precision.
- Watering In: Water the lawn with ¼ inch of irrigation or rainfall within 24 hours to move the fungicide into the soil.
- Frequency: Reapply every 28 days as needed, following label instructions for your specific disease target.
Integrating Azoxystrobin Into Your Lawn Care Routine
- Use in a Bulletproof Strategy: For best results and to prevent disease resistance, alternate azoxystrobin with a fungicide that has a different mode of action, such as propiconazole.
- Monitor Lawn Health: Watch for weather changes and early disease symptoms to time your applications for maximum protection.
- Combine With Good Practices: Regular mowing, proper watering, and balanced fertilization all help your lawn resist disease and recover faster.
The Bottom Line
Azoxystrobin is a powerful tool for both preventing and treating a variety of common lawn diseases. By understanding when and how to use it, you can keep your lawn looking thick, green, and healthy all season long.
Ready to protect your lawn? Shop Azoxystrobin (Azoxy) 2SC Select and download our FREE Fungicide Guide to get started!
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