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Prosaro East


Rely on Prosaro® fungicide, Canada’s #1 cereal fungicide to make the grade. Trust the proven performer with the broadest spectrum of leaf disease control and fusarium head blight activity for improved yield and quality. Combined with its post-infection and protective properties, Prosaro makes a visit to the elevator about as automatic as it gets.

Prosaro is the most effective fungicide for suppressing FHB (scab) in wheat and barley, and reducing mycotoxin levels in the grain, while stopping all the major yield-robbing leaf diseases.

  • When applied at early flowering of the wheat head and just after head emergence in barley, Prosaro protects the florets from FHB infection through the grain fill period while also supplying post infection activity on leaf diseases.
  • Effectively reduces levels of DON and other fungal mycotoxins in the harvested grain, which present a significant health risk to humans and can cause feed refusal.
  • Outstanding curative and protective activity against foliar diseases: leaf rust, stem rust, septoria leaf and glume blotch, tan spot and net blotch.
  • Delivers higher yield and improved quality: plump kernels with high test weight, more bushels and less risk of dockage.

Product Summary


Product Type

  • Fungicide


Diseases Controlled

Diseases Controlled (Top 3)

Diseases Supressed

Diseases Suppressed (Top 3)

  • Fusarium Head Blight
Groups and Active Ingredients

Groups and Active Ingredients

  • Prothioconazole Group 3
  • Tebuconazole Group 3
Formulation Type

Formulation Type

  • Emulsifiable Concentrate


  • 6.5L Jug = 20 ac.
  • 104L bulk shuttle = 320 ac.

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Active Ingredients

Prothioconazole - Group 3
Tebuconazole - Group 3

Diseases Controlled

Leaf rust
Net blotch
Powdery mildew
Septoria leaf blotch
Stem rust
Stripe rust
Tan spot

Diseases Suppressed

Fusarium head blight

Province of Registration

British Columbia
New Brunswick
Northwest Territories
Nova Scotia
Prince Edward Island

Application Tips


  • Apply Prosaro when the peak number of florets is in the open, exposed stage to reduce the number of scabby kernels, lower DON levels, and to achieve plumper grains and higher test weights.
  • For fusarium head blight (FHB) suppression, coverage of the heads is essential – best results are achieved using a configuration with forward/backward nozzles such as using alternating turbo floodjets or double swivel turbo teejet nozzles.


Yield More with Prosaro


Source: Combined data from Eastern and Western trials from 2009-2011 (19 Western sites, 4 Eastern sites)


Prosaro is unsurpassed in DON reduction


Source: 17 Western Canada Trials on spring wheat- 2009-2011


Prosaro delivers more consistent DON reduction, even when Fusarium risk is high


Source: 17 Western Canada Trials on spring wheat- 2009-2011


Application Timing
  • For control of leaf and stem diseases, apply Prosaro from the late vegetative stage (flag leaf fully emerged to awn emergence) to the end of the flowering stage (commonly referred to as T3 timing by Bayer) 
  • For optimum protection against FHB without compromising leaf disease control:
Barley Scout fields for T3 (Z59, Day 0), when the head is just clearing the ligule. Aim to apply at Z 60, Day +2, when 70 to 100% of the main stem barley heads are fully emerged to 3 days after full head emergence.

Click here for the Barley and Wheat FHB Timing Guide
Wheat Scout fields for T3 (Z 59, Day 0) when the head is just clearing the ligule. Aim to apply at Z 60, Day +2, the beginning of pollination (when anthers are visible only in middle of head).

Click here for the Barley and Wheat FHB Timing Guide
Wheat and Barley If risk was low at initial heading, treatment should ideally occur one or two days after rain


800 mL/ha (324 mL/ac.)


6.5 L jug = 8.1 ha (20 ac.) (2 x 6.5 L jug treats 40 acres)


Rainfast one hour after application


Water Volumes
  • Ground – 150-175 L/ha (15-19 gal./ac.)
  • Aerial – 50 L/ha (5 gal/ac.)

Resistance Management

Registered Tank Mixes

Tank mixable with Lorsban for wheat midge control. Tank-mix order is Prosaro then Lorsban; no need to add a surfactant.


Region:  Nova Scotia

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