The following agenda is tentative and subject to change. Check back regularly for updates.

Tuesday, Feb. 27, 2018

Welcoming Remarks
KEYNOTE – Global state of herbicide resistance
Presented by Mark Peterson, Global Product Development Leader, Dow AgroSciences - Chairman, Herbicide Resitance Action Committee

Resistant weeds have been around almost since the beginning of synthetic herbicides, but the issue has taken on a new urgency in the past few years. Basic evolutionary biology principles drive the development of resistance and understanding these principles can help design resistance management programs. Adoption of best management practices can help preserve our critically important herbicide tools.

The crop protection industry is actively working on new technologies to address resistant weeds, but discovery of unique herbicide modes of action has become elusive. Other weed control technologies such as RNAi have shown promise but are many years away from being practical. Even new technologies will need to be stewarded. Ultimately, herbicide resistance is a numbers game. The first step farmers can take to limit the development and spread of resistance on their farms is to manage the number of weeds and weed seeds on their farms. Highly effective herbicide programs with overlapping modes of action and soil residual will minimize weed escapes. Even a few escaped weeds per acre can add millions of weed seeds to the field and enhance the odds of producing a rare individual weed that contains a resistance mutation. Novel, multi-layered approaches to weed management are out there but they require time and attention. Mark will also touch on the impact of next-gen herbicide-tolerant crops on herbicide-resistant weeds.
Results from Top Crop Manager’s Herbicide Use Survey
Presented by Gerald Bramm, President, Bramm Research
Sponsored by
DowAgroSciences 4NEWMonsanto2

Get an early look at the results of TCM’s first-ever Herbicide Use Survey, plus exclusive insights to help you gain a deeper understanding of how herbicides are being used in your area and across the country.
Sponsored by
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Evolution of Resistance: Amaranth Species and Group 14 Herbicides

Presented by Franck Dayan, Professor in the Department of Bioagricultural Sciences and Pest Management, Colorado State University

Sponsored by

Franck Dayan will focus on how two plants from the Amaranth species (waterhemp and Palmer amaranth) have evolved to resist Group 14 herbicides. He will explain how Protoporphyrinogen oxidase (PPO, Group 14) herbicides work, as well as cover the research underway to help growers deal with these resistant weeds.

A few of the key takeaways from the presentation will include strategies to manage and mitigate this type of herbicide resistance, including the role of crop rotation and avoiding the application of herbicides with the same mode of action over several years.

State of herbicide resistance in Western Canada
Presented by Hugh Beckie, Weed Scientist, Agriculture and Agri-Food Canada and Adjunct Professor, Department of Agricultural, Food and Nutritional Science at the University of Alberta
Sponsored by
L mixitup btought to you by Bayer 4C HORZ EN

Since the initial discovery of herbicide-resistant (HR) weeds in the late 1980s in Western Canada, the majority of annual cropland across the prairies is now affected by HR weeds – most notably wild oat, green foxtail, kochia, and cleavers.

Beckie will discuss the results of the 2014-15 Saskatchewan weed resistance survey and the 2016 Manitoba survey (Alberta was surveyed in 2017 but results pending), as well as 2012-2016 test results of samples submitted by producers or industry.

Additionally, the results of Saskatchewan and Manitoba producer management questionnaires regarding adoption of weed resistance management practices and cost of resistance will be highlighted, in the context of recommended best management practices.
Networking Break
Harvest weed seed control
Presented by Breanne Tidemann, Research Scientist, Agriculture and Agri-Food Canada

Explore the theory behind harvest weed seed control, its use in Australia, the adoption levels there, and the newest techniques. Breanne will provide an overview of research conducted in Canada on the potential for harvest weed seed control, its potential to control problematic species like wild oat, cleavers, volunteer canola and kochia, and cropping system opportunities (i.e., swathing versus straight-cutting). She will also provide updates on Harrington Seed Destructor stationary testing and the implementation of field testing in Canada. Breanne and her team have learned a number of valuable lessons already in fall 2017 on using the Harrington Seed Destructor in western Canada, and those lessons will be shared with the audience.
Glyphosate-resistant weeds in Ontario: Distribution and control
Presented by Peter Sikkema, Professor of Field Crop Weed Management - University of Guelph, Ridgetown Campus

Glyphosate resistant (GR) common ragweed, waterhemp, giant ragweed and Canada fleabane have been confirmed in 1, 3, 6 and 30 counties in Ontario, respectively.

Surveys show that over time the number of locations is increasing and GR weeds are found over a wider geographical area. In Ontario studies, GR Canada fleabane interference reduced corn and soybean yield 65 and 71 per cent, and GR waterhemp competition reduced corn and soybean yield 52 and 32 per cent, respectively.

A nine-year Integrated Weed Management study has been established on two Ontario farms to determine if GR waterhemp seed in the seedbank can be depleted. It is important to implement weed management practices that limit the selection of additional herbicide-resistant weeds. This will ensure the usefulness of glyphosate and GR crops for many years in the future.
Networking Break
PANEL – Three farmers share their management techniques for herbicide-resistant weeds
Happy Hour
Sponsored by
Gowan Canada
End of Day One

Wednesday, February 28, 2018

Buffet Breakfast
Group 4 resistance and the North American Kochia Action Committee
Presented by Todd Gaines, Assistant Professor, Department of Bioagricultural Sciences and Pest Management at Colorado State University

Gaines will cover the current status of Group 4 resistance in weeds, an overview of the North American Kochia Action Committee, and mechanisms of dicamba resistance in kochia. Much progress has been made recently in the understanding of how weeds can evolve resistance to Group 4 herbicides. He will share the currently-known distribution and frequency of Group 4 resistant weeds, as well as discuss several recently discovered resistance mechanisms including dicamba resistance in kochia. The North American Kochia Action Committee formed in 2017 to bring together a group focused on kochia biology, management, and herbicide resistance, and Gaines will cover the objectives and role of the committee.
KEYNOTE – Emergence and status of HR in Europe and its management: What can Canada learn?
Presented by Josef Soukup, Professor in the Department of Agroecology and Biometeorology at the Czech University of Life Sciences in Prague, Czech Republic

Josef will present an overview of European agricultural practices and factors leading to the emergence and spread of herbicide resistance and main threats for the future.

Diversity of cropping systems, environmental conditions and weed flora produce a variety of specific cases of herbicide resistance. Overview of major European agricultural practices and factors leading to the emergence and spread of herbicide resistance and main threats for the future will be presented. Solutions-focused information about the strategies for management and mitigation of herbicide resistance, which are being implemented on farms voluntarily or as a consequence of recent political documents, such as EU directive ensuring sustainable use of pesticides will be shared with participants.
Networking Break
Using agronomy to control weeds: What works, what doesn’t
Presented by Steve Shirtliffe, Professor in the Department of Plant Sciences at the University of Saskatchewan

Decades of research and experience has taught us one unequivocal truth: Using herbicides selects for herbicide resistant weeds. However, when scientists are pressed for solutions they often offer up a shopping list of every possible chemical and non-chemical method that can control weeds. This presentation will attempt to cut through the vagueness of scientific recommendations and give farmers key practical advice on how to effectively control weeds while reducing the likelihood of selecting for herbicide resistance. I’ll be looking back at a couple decades worth of our alternative weed control research and critically evaluating the potential as well as the pitfalls of these methods. Weed control methods that we will be looking at include growing competitive crop varieties, harvest weed seed management, mechanical weed control, alternative herbicide application methods and combining tactics.
Managing resistance with sprayer application technology
Presented by Tom Wolf, Founder, Agrimetrix Research & Training
Sponsored by

It has been reported that repeated use of sub-lethal herbicide doses can accelerate the development of resistant weed populations for outcrossing species such as rigid ryegrass, palmer amaranth and kochia. Herbicide dose can be sub-lethal for to a number of reasons, including poor nozzle patternation (linked to spray pressure and boom height), and also spray displacement due to spray quality, wind, and sprayer-induced turbulence. This presentation will report on new research that documents spray deposit uniformity for a number of common application methods.
Closing Remarks
End of Day Two
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