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Prosaro 421 SC Fungicide
CROP PROTECTION

Prosaro 421 SC Fungicide

Fungicide
Prosaro® fungicide improves grain quality and maximizes yield through its unbeatable spectrum of disease control, increasing your profit potential.
Approved In
AL, AR, AZ, CO, CT, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY
Selected image
    Fights Scab icon
    Fights Scab
    Controls scab, a disease that leads to elevated DON levels, low grain fill and yield loss
    Protects Against Disease icon
    Protects Against Disease
    Two very effective active ingredients for unsurpassed control of both leaf and head diseases, including leaf, stem and stripe rusts
    Rainfast icon
    Rainfast
    Within two hours of application or until fully dry on the plant surface
    Group NumberFormulaRegistration Number
    GROUP 3 FUNGICIDE liquid0000264-00862-AA-0000000
    Active IngredientFormulation
    Prothioconazole19 %
    Tebuconazole19 %
Labels / Safety Data Sheets (MSDS)
PROSARO 421 SC FUNGICIDE Label
PROSARO 421 SC FUNGICIDE MSDS - Spanish
PROSARO 421 SC FUNGICIDE MSDS - English
Use on Wheat - Reduced Application Rate for Management of Rust Diseases
Use on Wheat - Reduced Application Rate for Management of Rust Diseases
Use on Wheat - Reduced Application Rate for Management of Rust Diseases

Effective Against

Our portfolio has products to fight a variety of weeds, pests and diseases.
Info
Fusarium Head Blight Scab
Leaf Rust
Septoria Leaf Blotch
Stem Rot
Stripe Rust
Tan Spot
Key Pests
A
Anthracnose
B
Blight, Fusarium Head
Blight, Helminthosporium Leaf
Blight, Northern Corn Leaf
Blight, Southern Corn Leaf
Blotch, Net
Blotch, Septoria Glume
Blotch, Septoria Leaf
Blotch, Spot
Blotch, Stagonospora
P
Powdery Mildew
R
Rust
S
Scald
Spot, Eye
Spot, Gray Leaf
Spot, Northern Corn Leaf
Spot, Tan

Registered Crops

Our products are available for use on a variety of different crops.
Info
checkcereals
Registered Crops
B
Barley
C
Corn, Field
Corn, For Seed
Corn, Sweet
D
Durum
P
Popcorn
W
Wheat
Wheat, Spring-Seeded
Wheat, Winter
Additional Downloads
2017 Prosaro Application Card
2017 Prosaro Barley Product Bulletin
Product Bulletin 2023
Use and Mixin

Use and Mixing

The instructions for use and mixing described below are from the Environmental Protection Agency approved Federal Label. Always read and follow label instructions. Not all products are registered for use in every state. Please check with Bayer or your local Lead State Agency for product registration status. If you wish to find out if a product is registered in your state or for additional product information, send us an email or call 1-866-99-BAYER.
      MIXING INSTRUCTIONS
      PROSARO 421 SC FUNGICIDE Alone: Add 1/2 of the required amount of water to the mix tank. With the agitator running, add the PROSARO 421 SC FUNGICIDE to the tank. Continue agitation while adding the remainder of the water. Begin application of the solution after the product has completely and uniformly dispersed into the mix water. Maintain agitation until all of the mixture has been applied.
      Reentry PPE
      PPE required for early entry to treated areas that is permitted under the Worker Protection Standard and that involves contact with anything that has been treated, such as plants, soil, or water is:\r\n- Coveralls\r\n- Chemical-resistant gloves made of any waterproof material.\r\n- Shoes plus socks
      PPE
      Applicators and other handlers must wear: - Long-sleeved shirt and long pants - Chemical resistant gloves made of any waterproof material - Shoes plus socks Follow manufacturer's instructions for cleaning/maintaining PPE. If no such instructions exist for washables, use detergent and hot water. Keep and wash PPE separately from other laundry.
      Tankmix Compatibility
      PROSARO 421 SC FUNGICIDE + Tank-Mix Partners: Add 1/2 of the required amount of water to the mix tank. Start the agitator running before adding any of the tank-mix partners. In general, tank-mix partners should be added in this order: products packaged in water-soluble packaging*, wettable powders, wettable granules (dry flowables), liquid flowables, liquids, and emulsifiable concentrates. Always allow each tank-mix partner to become fully and uniformly dispersed before adding the next product. Provide sufficient agitation while adding the remainder of the water. Maintain agitation until all of the mixture has been applied. * Note: When using PROSARO 421 SC FUNGICIDE in tank mixtures, all products in water-soluble packaging should be added to the tank before any other tank-mix partner, including PROSARO 421 SC FUNGICIDE. Allow the water-soluble packaging to completely disperse before adding any other tank-mix partner to the tank. If using PROSARO 421 SC FUNGICIDE in a tank mixture, observe all directions for use, crop/sites, use rates, dilution ratios, precautions, and limitations; which appear on the tank-mix product label. No label dosage rate must be exceeded, and the most restrictive label precautions and limitations must be followed. This product must not be mixed with any product that prohibits such mixing. Tank mixtures or other applications of products referenced on this label are permitted only in those states in which the referenced products are registered. PROSARO 421 SC FUNGICIDE is compatible with most insecticide, fungicide, herbicide, and foliar nutrient products. However, the physical compatibility of PROSARO 421 SC FUNGICIDE with tank-mix partners should be tested before use. To determine the physical compatibility of PROSARO 421 SC FUNGICIDE with other products, use a jar test, as described below. Using a quart jar, add the proportionate amounts of the products to 1 qt. of water. Add wettable powders and water-dispersible granular products first, then liquids, and emusifiable concentrates last. After thoroughly mixing, let stand for at least 5 minutes. If the combination remains mixed or can be remixed readily, it is physically compatible. Once compatibility has been proven, use the same procedure for adding required ingredients to the spray tank. For further information, contact your local Bayer CropScience representative. The crop safety of all potential tank mixes including additives and other pesticides on all crops has not been tested. Before applying any tank mixture not specified on this label, the safety to the target crop should be confirmed. To test for crop safety, apply PROSARO 421 SC FUNGICIDE to the target crop in a small area and in accordance with label instructions for the target crop.

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