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Time to Diversify

Wild Oat resistance in Saskatchewan continues to grow

Latest herbicide resistance study shows major increases

During the summers of 2014 and 2015, Agriculture and Agri-Food Canada, led by Hugh J. Beckie, Scott W. Shirriff and Julia Y. Leeson conducted a herbicide resistance survey of 400 fields across the province of Saskatchewan. This was the third herbicide resistance survey conducted since 2000 (2003, 2009, and 2014/2015).

Seeds were collected from weeds in each field just prior to harvest for the purpose of testing for herbicide resistance. Wild oat (the most prevalent grass weed across most of Western Canada and of major concern regarding herbicide resistance) was collected from 301 fields.

Results show a dramatic increase in the number of fields with wild oat herbicide resistance to Group 1 and Group 2:

Group 2 Wild Oat resistance on the rise

Results indicate a sharp increase in the number of fields with group 2 resistance, which is not surprising considering more acres have been treated with group 2 wild oat chemistry in recent years.

Manitoba and Alberta results coming soon

Results from surveys conducted in 2016 for Manitoba and 2017 for Alberta are yet to be released, but researchers expect similar results (Western Producer article, 2017). A large % of barley, canola, pea and wheat acres in all provinces had a Group 1 or 2 applied in 2015 (Stratus Survey data):

Diversify your wild oat control with Group 3 and Group 8 herbicides

In 2015, Groups 1 and 2 were used to target wild oats on 74% of wheat acres, 61% of barley acres, 100% of pea acres and 42% of canola acres,2 resulting in tremendous selection pressure for the development of wild oat resistance.

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Get the most out of pre-emergent, soil-residual herbicides from Gowan

Herbicide base layering is a key strategy for managing herbicide-resistant weeds. Avadex®, Fortress® and Edge® herbicides work well in most cropping situations—conventional tillage, min-till and zero-till for cereals, oilseeds and pulses.

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Reasons to Use Soil Residual Herbicides

From increasing your yields to allowing greater flexibility in your herbicide application schedule, there are many benefits to applying Soil Residual Herbicides. Watch the video below to learn more about how Soil Residual Herbicides can work for you.

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Choose the Right Base Layer Product

Determine which herbicide is right for your field, based on the weed problem and the type of crop.

Group 1 or 2 Wild Oats Broadleaf Weeds No Resistance
Cereals + Pulses Cereals Cereals
Avadex Liquid EC Fortress MicroActiv Avadex Liquid EC
Avadex MicroActiv Avadex MicroActiv
Oilseeds Oilseeds + Pulses Oilseeds + Pulses
Fortress MicroActiv Edge Granular Edge Granular
Treflan Liquid EC Fortress MicroActiv
Treflan Microactiv Treflan Liquid EC
Treflan Microactiv
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The pre-emergent yield advantage

Any early season competition from wild oats will reduce yields, even with as few as three plants per square metre (Ag Canada, Lacombe).

Timing of Wild Oats Removal

Bar graph depicting loss of yield based on timing of wild oats removal.

Source: Monsanto 4-year Independent Study.

The value of a base layer

Including Fortress can maximize yield with reduced early-season weed pressure. Plus the added bonus of more flexibility when timing your in-crop herbicide.

Yield and Wild Oat Control – Fortress in LibertyLink System

Very heavy wild oat pressure – over 350 plants/sq metre

Bar graph depicting herbacide performances

Source: University of Saskatchewan Study. 2007.

Our Products

Avadex MicroActiv Logo

Avadex MicroActive is a highly active, easy-to-apply, granular herbicide that can be used in all types of tillage situations.

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Avadex Liquid EC Logo

Avadex Liquid EC herbicide is a great option for spring application in conventional tillage situations.

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Edge Granular Logo

Edge granular herbicide is a proven pre-emergent residual herbicide providing early weed removal and long-term control of grassy and broadleaf weeds.

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Fortress Logo

Fortress has both Group 3 and Group 8 herbicides to provide control of wild oats, green and yellow foxtail, and suppression of certain annual broadleaf weeds.

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Treflan Liquid EC Logo

Treflan® Liquid EC Herbicide is abroad-spectrum, residual, grassy and broadleaf weed herbicide specially suited for conventionally tilled fields with low amounts of crop residue.

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Treflan MircoActiv Logo

Treflan® MicroActiv Herbicide is a broad-spectrum, residual, grassy and broadleaf weed herbicide specially suited for minimum and zero till fields.

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Learn More

Contact your local Gowan representative to find out how to add more diversity to your wild oat management program.

Neil Friend

North and Central Alberta
(780) 781-3650

Valerie Wilton

Southern Alberta
(403) 892-3058

Jim Vancha

Western Saskatchewan
(306) 951-7008

Garry Schultz

Southeast Saskatchewan
(306) 540-8079

Phil Deobald

Southwest Saskatchewan
(306) 741-2608

Alan Christison

Southern and Eastern Manitoba
(204) 390-2340