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QUALI-PRO

Strobe 50WG Systemic Fungicide

Strobe 50WG Fungicide is a broad-spectrum fungicide that can be applied to eliminate fungal diseases or prevent them from appearing. It comes in wettable granule form and works systemically.

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Strobe 50WG Systemic Fungicide product page
Min : 89.5 - Max : 686.89
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Price as of
09/22/25
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Strobe 50WG Fungicide, manufactured by Quali-Pro, is the generic brand of Heritage WG Fungicide and is designed to deliver broad-spectrum control and prevention of a number of common plant diseases.

The product works systemically by being absorbed through a plant's leaves, crowns, and roots to stop disease at any stage of development.

Strobe 50WG Fungicide comes in wettable granules and is easy to mix and apply. It is used to treat common diseases like anthracnose, brown patch, leaf spot, and many others.

Tools Needed

You can use either a backpack sprayer or a handheld pump sprayer.

How to Use

Fungicide lawn care Strobe 50WG

  • Step 1: Determine how much Strobe 50WG Fungicide to use by measuring the square footage of the treatment area. To do this, measure the length and width of the treatment area in feet, then multiply them together (length x width = square footage). The recommended rate for Strobe 50WG Fungicide is 0.2 oz. to 0.4 oz. per 1 to 2 gallons of water to treat 1,000 sq. ft. For example, if you calculated a 3,000 sq. ft. area to treat, you would need to mix 0.6 to 1.2 oz. of product in 3 to 6 gallons of water.
  • Step 2: In a handheld pump sprayer, add half of the required amount of water and then add the appropriate measured amount of product based on your calculations. Then, fill the sprayer the rest of the way with water and agitate until well-mixed.
  • Step 3: Spot-treat the areas on your lawn where you see the fungal disease. We recommend using a cone fan nozzle tip to get a nice, even coating on the infected plant.
  • Step 4: Reapply as needed every 14 to 28 days until you no longer see a disease problem. Depending on the disease type, it may take up to two months of diligent treatments to completely eliminate the disease.

Where to Use

Strobe 50WG Fungicide is used to control diseases on turf and ornamentals on golf courses, lawns, and landscaped areas around residential, institutional, public, commercial, and industrial buildings, parks, recreational areas, and athletic fields.

When to Use

Use this fungicide during the growing season when there is a disease affecting your lawn, particularly in the summertime when the lawn may be going through stress. You can also apply it preventatively during the growing season.

Safety Information

Strobe 50WG Fungicide is safe to use around children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and applying this product. 

Do not allow people or pets to enter the treated area until 4 hours have passed after application. 

Special Considerations

While Strobe 50WG Fungicide can be tank-mixed with other pesticides, it has demonstrated some phytotoxic effects when mixed with emulsifiable concentrates. These effects are enhanced if applications are made under cool, cloudy conditions, and these conditions remain for several days following application.

AvailabilityOnline
Restricted UseNo
Shipping Restrictions6 Pound: AK, CA, CT, HI, MI, NY, OR, RI, SC, VT
1 Pound: AK, CA, CT, HI, MI, NY, OR, RI, SC, VT
BrandQUALI-PRO
Keith's Pro Tips"When you have persistent disease problems or the conditions are heavily favorable for disease, use the higher rates and shorter application intervals of Strobe 50WG for the best possible results."
Product DrawbacksAzoxystrobin 50 WG does not control dollar spot. Repeat applications may be necessary depending on the severity and type of the plant disease.
Target PestsStrobe 50WG treats a variety of different common plant diseases such as: Anthracnose, brown patch, cool weather brown patch, fairy ring, fusarium patch, gray leaf spot and more. Check the label for the complete list.
Application EquipmentPump Sprayer
Application MethodsSpot Treatment
Active IngredientAzoxystrobin 50.00%
Product TypeFungicide
FormulationWater Dispersible Granule (WDG)
Application RateYou will mix 0.2 to 0.4 oz per 1 to 2 gallons of water. For more specific application rates please refer to the label.
Shelf LifeStrobe 50WG will last for up to 1 to 2 years when stored according to the product label. Store Strobe 50WG in cool, dry storage areas in the original container.
YieldIf Strobe 50WG is used at the lower rate of use each 1 pound container will treat an estimated 80,000 square feet.
Use SitesOutdoors
Time to KillStrobe 50WG should be reapplied at 14-28 day intervals depending on target disease for best control. It may take up to 2 months before complete control is achieved.
Comparable ProductsHeritage Fungicide, Patch Pro
EPA Registration #53883-343
More Information
Restricted Use No
Shipping Restrictions AK, CT, HI, MI, NY, OR, RI, SC
Availability Online
Signal Word CAUTION
Keith's Pro Tip "When you have persistent disease problems or the conditions are heavily favorable for disease, use the higher rates and shorter application intervals of Strobe 50WG for the best possible results."
Target Pests Multi Aerial Blight, Agrocybe Pediades, Alternaria Leaf Spot, Anthracnose, Botrytis Blight, Brown Patch, Cercospora Leaf Spot, Conifer Blights, Cool Weather Brown Patch, Diplodia Tip Blight, Downy Mildew, Entomosporium Leaf Spot, Erysiphe Pannosa, Fairy_Ring, Flower Blight, Fusarium, Fusarium Patch, Gray Leafspot, Gray Snowmold, Gymnosporangium, Iris Leaf Spot, Leaf Blight, Leaf Rust, Leaf_Spot, Lophodermium Needlecast, Marrsonina Leaf Spot, Melting Out, Microspbaera Azaleae, Myrothecium Leaf Spot, Necrotic Ring Spot, Needle_Rust, Phomopsis Blight, Phragmidium, Pink Patch, Pink Snowmold, Powdery Mildew, Puccinia, Pythium Blight, Pythium Root Rot, Red Thread, Rhizoctonia Large Patch, Rhizoctonia Solani, Rose Blackspot , Rust, Scabs, Sclerotium Rolfsii, Septoria Leaf Spot, Shoot Blight, Southern Blight, Sphaerotheca Pannosa, Spring Dead Spot, Stem Rust, Stripe Rust, Summer Patch, Swiss Needle Cast, Take-all Patch, Tip Blight, Typhula Blight , Yellow Patch, Zoysia Patch
Time to Kill Strobe 50WG should be reapplied at 14-28 day intervals depending on target disease for best control. It may take up to 2 months before complete control is achieved.
Chemical Type Fungicide
Formulation Water Dispersible Granule (WDG)
Application Methods Spot Treatment
Product Drawbacks Azoxystrobin 50 WG does not control dollar spot. Repeat applications may be necessary depending on the severity and type of the plant disease.
Active Ingredient Azoxystrobin 50.00%
Application Equipment Pump Sprayer
Mix Rate You will mix 0.2 to 0.4 oz per 1 to 2 gallons of water. For more specific application rates please refer to the label.
Use Sites Outdoors
Yield If Strobe 50WG is used at the lower rate of use each 1 pound container will treat an estimated 80,000 square feet.
EPA Registration No. 53883-343
Shelf Life Strobe 50WG will last for up to 1 to 2 years when stored according to the product label. Store Strobe 50WG in cool, dry storage areas in the original container.
Comparable Products Heritage Fungicide, Patch Pro
Children or pets? No
Property Characteristics None

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