Azoxystrobin (Azoxy) 2SC fungicide - Liquid Alternative to Scotts DiseaseEx

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Don’t get sticker shock at the price - lots of details here on lawn disease control with liquid spray mixed azoxystrobin - alternative to Scotts DiseaseEx granular.

Lawn diseases can creep into any lawn, any grass type, and having a solid strategy to prevent or get rid of a lawn fungus is important and oftentimes required. For years we have been teaching the “bullet proof strategy” which incorporates the use of two fungicides with 2 different modes of action to attack lawn disease problems. These two fungicides are active ingredients propiconazole and azoxystrobin. This product listing is for a liquid concentrated formulation of azoxystrobin.

Liquid Alternative to Scotts DiseaseEx

Previously we recommended Scotts DiseaseEx which is a granular formulation of azoxystrobin (and still do) but many of our customers have asked for a liquid alternative and this is that.

The “SC” stands for “suspension concentrate” which just means that you take a small amount of the concentrate in this bottle, mix/stir it into 2 gallons of water, and that makes a liquid suspension that can be sprayed out on 1,000 sq ft of turf.

For most DIYers, this would mean using a hand can/battery pump sprayer or for larger lawns, a pull behind tank sprayer. This product is NOT meant to be applied from a hose end sprayer such as the Ortho Dial-N-Spray. That method does not offer enough precision, so if you are looking at using this product, be sure you have a trusty battery powered tank sprayer or something similar.

The use rates of azoxystrobin 2SC will vary depending on if you are applying this product as a preventive or curative, and also by what fungal problem you are targeting. In most cases, if you follow Lawn Care Nut strategies, you would use this product for brown patch disease in cool season lawns, or large patch disease in warm season lawns. It can of course be used for other disease problems but these are the two most common talked about in Allyn’s videos and newsletters.

How Much Azoxystrobin 2SC To Apply

In general, use rates for this product are .38 to .77 oz/1000 sq ft when you are going after brown patch or large patch disease. (which is the most common disease we use this for).

If you are using this product as a preventative before disease problems manifest you would use the low rate of .38 oz/1000 but if using as a “rescue” or curative application, then the higher rate of .77 oz/1000 sq ft would be used. The label tells you how often to apply these depending on the target.

Important note: the mix rates on the label are in 2-4 gallons of water. This is different than what we usually talk about. With this product, if the rate is expressed as .38 - .77 oz/1000 - tht small amount of concentrate is to be mixed into 2-4 gallons of water and that spray mix is to be evenly applied across 1,000 sq ft. For DIYers and our limited spray equipment, we will almost always use the 2 gallon rate which is just fine. But again, just be aware, the amount of concentrate goes in 2 gallons of water and 2 gallons of spray mix covers 1,000 sq ft.

How Much Does This Product Cover?

We have this azoxystrobin concentrate in 2 sizes: a 16 oz pint and a 128 oz gallon. Most DIYers can do just fine with the 16 oz pint, here’s why:

Coverage wise, if you are using the low rate of .38 oz/1000 then the 16oz pint will cover 42,000 sq ft. If you have a 5,000 sq ft lawn, you would get 8+ applications from the 16 oz of concentrate.

If you are using the high rate of .77 oz/1000 sq ft, you will get 20,000 sq ft of coverage.

This is something to keep in mind when you look at the price. The pint is $120 up front but for many of you this will last a couple-two-tree years or more. You’ll notice this with many of the “professional” formulations.

Real quick: if all of this is confusing to you, then just stick with granular products - they are easier to work with and there is much less math involved. However, if you are more advanced and understand what we have typed up for you here then go for it. The liquid applications work better and faster overall.

From the manufacturer

Active Ingredient/Concentration
  • Active Ingredient Azoxystrobin 22.9%. Can be used on all grass types, cool and warm season.
Diseases Controlled or Suppressed
  • Brown Patch, Brown Ring Patch, Leaf Spot, Leaf Rust, Pink Patch, Pink Snow Mold, Powdery Mildew, Pythium Blight, Pythium Root Rot, Spring Dead Spot, Stem Rust, Southern Blight, Summer Patch, Yellow Patch and others * See label for complete list For use in Commercial and Residential Turf, Parks and Recreation, Athletic Fields, Golf Courses
  • All grass types: Broadcast 0.38 - .77 oz in 2 to 4 gallons of water per 1,000 sq. ft. (there are a couple diseases that require a larger use rate but we rarely mention them in our strategies)
  • Ornamental: 1.9 - 7.7 oz. per 100 gallons of water
  • Group 11 Fungicide (mode of action)


Note: Azoxystrobin is NOT recommended for use on dollar spot disease. Propiconazole is much better for that. In fact, if you have had issues with dollar spot disease in the past and that is your target, you should only use propiconazole, not this azoxystrobin.