Proline West


Introducing Proline®, an easy-to-use fungicide that's the number one choice of canola growers for effective sclerotinia protection. Simply apply a timely application to your canola between 20 to 50% bloom stage and you've effectively reduced infection rates by up to 80%.

Thanks to scientifically proven Proline, you'll also be proactively protecting your profits. And there's a lot to lose: in 2012, sclerotinia cost the average canola growers just over $38,000* or more pending the severity of infection.

So remember, no illusions or sleight of hand here. It's just the incredible power of Proline fungicide.

*Based on Agriculture Canada Statistics

Take a closer look at how Proline reduces sclerotinia infection:





Control Sclerotinia for exceptional yield performance

Sclerotinia can wreak havoc on your bottom line. Even more alarming? Sclerotinia can remain relatively undetected for long periods of time and once it becomes visible – it’s already too late.

Sclerotinia sclerotiorum

Infection in canola occurs primarily at flowering from air-borne ascospores which infect blossoms during periods of extended wetness.

Symptoms include:

  • Appears as a soft, watery rot
  • Premature ripening
  • Pale grey or white lesions on stems, branches, pods
  • Straw-coloured plants
  • Frequent lodging and shattering at swathing
  • Premature death and ripening is the problem with this disease

Infection can result in:

  • Decreased yield potential
  • Death of plant before seed development
  • Uneven seed maturation
  • Underdeveloped seed pods
  • Reduced seed weight
  • Increased risk of losses in swath

The loss of crop by this disease is often overlooked. The economic implication of sclerotinia is significant when you do the math.

Yield loss potential:
(Yield x Infection Rate) x 50%* = Yield Loss Potential

Calculation example for 40 bu./ac. yield with 30% infection rate and 50% estimated yield loss*:
(40 x 0.3) x 0.5 = 6 bu./ac. yield loss potential

*Yield loss is half of infection rate

Want to calculate your potential ROI? Click here to use our Fungicide ROI calculator.

Key Challenges with Sclerotinia:

  • A key difficulty in managing sclerotinia is the variability in its prevalence and severity from year to year, region to region and field to field
  • Prevalence has a direct correlation to above-average moisture
  • Even after infection, the severity of symptoms and the effect on yield will vary according to temperature, rainfall, crop density and especially the crop stage at the time of infection
  • Regular rains or high humidity a couple weeks before and during flowering generally result in sclerotinia infection. If these conditions continue after flowering, severity of the disease will be high and yield loss will be significant.

Growers Talk

Active Ingredients

Prothioconazole - Group 3


Brown Mustard
Oriental mustard
Yellow Mustard

Pests Suppressed

Provinces Registered

British Columbia
New Brunswick
Northwest Territories
Nova Scotia
Prince Edward Island



  • Canada's number one canola fungicide
  • Easy-to-use liquid formulation 
  • Treats 80 acres in one single case
  • Treated acres outyield untreated acres, even when sclerotinia isn’t visible
  • Manages risk of disease overwintering in the soil and sets the field up for future years’ crop
  • Cleaner fields result in faster swathing and combining at harvest
  • There is always a yield benefit, increasing proportionately with infection rates


Application Tips

Canola, borage, crambe, mustard and flax 128-140 mL/ac.
(40-35 ac./jug)
Standard rate1
Barley, oats and wheat 128-170mL/ac.
(40-30 ac./jug)
Apply with a non-ionic surfactant and 0.125% v/v
Chickpeas and lentils 128-170 mL/ac.
(40-30 ac./jug)1
Corn 170 mL/ac.  
Soybeans 85 mL/ac.  
Sunflower and safflower 170 mL/ac.
(30 ac./jug)

1A non-ionic surfactant is not required when applying Proline on canola or pulses

Canola, mustard and flax Apply Proline® when the crop is in the 20 to 50% bloom stage. Best protection will be achieved when the fungicide is applied prior to petals beginning to fall, and will allow for the maximum number of petals to be protected. View the canola bloom stage timing guide.
Barley Apply Proline as a preventative spray within the time period when 70 to 100% of the barley main head stems are fully emerged to three days after full emergence.
Pulses Apply Proline at the first sign of disease.
Wheat Apply Proline within the time period from when at least 75% of the wheat heads on the main stem are fully emerged to when 50% of the heads in the main stem are in flower.
Oats Apply Proline as a preventative foliar spray when the earliest disease symptoms appear on the leaves and stems.
Corn Apply Proline from the development stage of corn between the tip of stigmata visible (silking) to the stigmata drying (silk browning).
Sunflower and safflower Apply Proline when the crop is in the 10 to 50% disk flower bloom stage.


Water Volume
  • Aerial - minimum of 4.5 US gal./ac. (17 L/ac.)
  • Ground - minimum of 10 US gal./ac. (38 L/ac.)


Rainfast one hour after application

Related Products

To help you get the most out of your InVigor® hybrid canola, Bayer offers a breadth of innovative crop protection solutions.

Canola Crop Protection



Start your canola off with the best chance of success with a simple tank mix of Pardner® herbicide with your pre-seed application of RoundUp WeatherMAX® herbicide, or glyphosate of your choice. Learn More

Prosper EverGol  

Prosper EverGol

Prosper EverGol seed treatment provides targeted protection of your InVigor seed with four different active ingredients, including penflufen for outstanding defence against rhizoctonia. Learn more



Decis insecticide controls a wide range of lepidopteran insects including Bertha armyworms, cutworms, and diamondback moths as well as flea beetles, lygus bugs and grasshopers. Learn more



Liberty herbicide is the backbone of the LibertyLink system, and with good reason. Nothing defends your canola better than the only Group 10 herbicide for canola on the market.  Learn more



Keeping wild oats out of your canola. Tank mix Centurion® herbicide with Liberty for effective grassy weed control. Learn more

In order to purchase InVigor hybrid canola or Liberty herbicide, growers will need to sign a one time Liberty & Trait Agreement (LTA). Growers can sign up at their local retail.

BayerValue Program
As one of the only companies who can offer a complete lineup of crop protection products and program savings, Bayer allows you to harness the full potential of your crop. You can save up to 10% on Proline® through the InVigor Purchase Bonus. Learn more


Region:  Other

Find My Local Bayer Rep

Don't know your local
Crop Science representative?

2017 Crop Production Guide

Now available online.

Copyright © Bayer CropScience