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WHAT’S NEW WITH BAYER CROPSCIENCE PRODUCTS

Herbicide Resistance in Canada A good bad example

erbicide resistance refers to a weed’s ability to successfully survive and reproduce after exposure to a lethal dose of herbicide. Although the situation at home is more optimistic than other areas of the world, Canadian farmers only have to look south of the border to see what the future will look like if we don’t start managing the problem properly. According to a survey of American growers conducted in 2012, almost half (49%) confirmed they had glyphosate resistant weeds in 2012* and the numbers continue to grow. Conversely, Canadian growers are just starting to notice the development of glyphosate resistance, a reassuring sign that it’s not too late, but a definite wake up call to change our ways. In addition to glyphosate resistance, Canada currently has over 50 other weed biotypes with resistance to one or more herbicide groups: Why should we care? Not only do resistant weeds take more money and time to manage, the loss of your old herbicide’s effectiveness leaves you with fewer tools to work with. However, the real concern is to protect the economic viability of your operation for the future. Following your herbicide application, resistant biotypes remain in crop and freely compete for available resources that would otherwise be dedicated to your desired crop.

In all cases, this results in decreased yield potential. The problem is then compounded once these resistant weeds propagate (go to seed), leading to an even worse situation the following year. Unmanaged, herbicide resistance can very quickly result in total crop loss and the inability to successfully sustain a farming operation. On the move Herbicide resistance usually spreads from one field to the next through three major routes: pollen, seeds and vegetative structures. However, we often forget that the genetic potential for resistance is always present in every weed population and only requires the repeated use of a single mode of action to manifest itself in our fields. Thus, we need to employ management strategies that will protect our farms from both foreign field invaders and internal uprisings. Integrated Management Systems Developing a concrete resistance management strategy is paramount to combatting resistance. Despite the various factors that create and further contribute to the development of herbicide resistance, employing a simple integrated weed management system can effectively delay the onset of resistance and preserve your most valuable weed management tools and the sustainability of your operation.

Source: 2012 Agri-Marketing, Glyphosate Resistant Weeds in US Crops

FARM FORUM / SPRING 2014

Resistant weed management strategies 1. P ERIMETER WEED MANAGEMENT Leave a 1m wide weed-free zone around your cropping fields (so new weeds can’t propagate and expand throughout your fields). 2. SCOUT OFTEN Scout often and take note of individual weed response to all applications (pre-emergent, post-emergent and pre-harvest). 3. CROP ROTATION Rotate crops as often as possible to utilize the unique modes of action available within the crop. 4. TIME FERTILIZATION Time and place fertilizer to benefit your crop, not weeds. 5. REMOVE ALL WEEDS Make sure you remove all weeds before they set seed – even if you have to pull by hand. Remember the old English proverb: One year seeding, seven years weeding. 6. TARGET PROBLEM WEEDS Systematically target problem weeds and respond quickly to changing weed populations. 7. OUTCOMPETE WEEDS Decrease your row spacing and increase seeding rates to maximize crop competitiveness and minimize time to crop canopy closure. 8. HERBICIDE EFFECTIVENESS Maximize your herbicide’s effectiveness: • Match selection of herbicide(s) with your most difficult weeds • Use full-labelled rates • Include the best tank mixes and adjuvant(s) • Use correct spray volume (follow label directions) • Use correct nozzle spacing and droplet size • Don’t spray at excess travel speeds, follow label directions • Apply during the best weather conditions (warm, humid, and sunny conditions with minimal wind) • Maximize rain-fastness intervals • Time of day (herbicides are most effective when sprayed between 8:00am and 9:00pm) For more information about herbicide resistance and effective management strategies visit MixItUp.ca

A NEWSLETTER FROM BAYER CROPSCIENCE

know your groups What you don't know can hurt you

otating to herbicides with different and new modes of action is a well-known strategy for managing herbicide resistance. But does your new herbicide really have a new mode of action? Is it even a different mode of action from your previous one? Although there are well over 150 different products registered for use in the global herbicide market, there is also a profound lack of diversity. In fact, only six different modes of action make up 77% of the products in market*. Generic herbicides, re-formulations of existing actives, combination products and the clutter and complexity of the market make it very difficult to know if you’ve actually switched to a different mode of action. Knowledge is power “Many growers believe they are rotating to new or different modes of action, when in fact they have been using the same mode year after year. This obviously has serious implications on the development of herbicide resistant weeds,” says Ian Scholer, manager broadleaf herbicides, Bayer CropScience. “You have to read the label and know your herbicide groups to be certain you are rotating properly. If your new product is from the same group as your old one, you’re only exasperating the situation.” What’s new? It’s a commonly held misperception that a new product will have a new mode of action, but in reality, almost every cereal herbicide brought to market in the last 30 years was made from an existing herbicide group and/or technology. The only exception was the introduction of pyrasulfotole (Group 27) in 2008. “Infinity® herbicide was the first product we (Bayer CropScience)

Global Herbicide Market by Mode of Action Class  EPSP’s (Round-Up)  ALS (Group 2’s)  ACCase (Group 1’s)  PSII (Group 5/6)  VLCFAS (Group 8)  Auxins (Group 4’s) Other MOA Six MOA classes represent 77% of the total global market Lack of herbicide diversity = strong resistance selection pressure Source: Bayer CropScience Agrowin 2010 based on market value

launched using this new Group 27 technology. The response from growers has been incredible, especially those with resistance concerns,” says Scholer. “This was something farmers had definitely been waiting a long time for.” Planning for the future Since 2008 Bayer has launched two other herbicide innovations utilizing pyrasulfotole including, Velocity m3 herbicide (2010) and Tundra® herbicide(2011). These products offer an all-in-one, pre-mixed grassy and broadleaf weed solution for cereal growers and the additional convenience of not having to tank mix. With no other new modes of action for the foreseeable future, all three technologies will play an instrumental role in the fight against resistant weeds. Scholer adds, “By adding any of these

Group 27 technologies to their regular rotation, growers will have the ability to effectively delay the onset of resistance and help protect the viability of their farms for future generations.”

Everything you want to know about maximizing your cereal crop’s health and yield potential is just a click away. Visit BayerCropscience.ca/ GrowYourKnowledge for videos featuring agronomic experts and the latest industry news and trends. After each video, you have the option to complete a quiz and earn CCA/ CCS credits. We’ll be updating the page with new information and videos. Be sure to check back often.

*Source: 2010 Bayer CropScience AgroWin, Global Herbicide Market by MOA

FARMFORUM.CA / SPRING 2014

WHAT’S NEW WITH BAYER CROPSCIENCE PRODUCTS

Pardner: Volunteer Canola Management A growing concern

A fresh start Bayer CropScience is pleased to announce that Pardner® herbicide is now registered as a pre-season, tank-mix partner with Roundup WeatherMAX® herbicide and other similar glyphosate technologies for control of all volunteer canola, even if they're resistant to other herbicide groups. Pardner shows an increase in control of volunteer canola over the current industry leader CleanStart®* herbicide.

Maximize Your Savings

100

Pardner Label*

16 Acres Per Jug

20 Acres Per Jug

The problem with volunteer canola Volunteer canola is no ordinary weed. Unchecked it has the potential to contaminate your new canola crop, spread disease and alter the desired oil content and profile of your harvested crop. But what really makes volunteer canola so hazardous is the high probability that it carries a genetic tolerance to one or more herbicide technologies (LibertyLink®, Genuity®, Roundup Ready® and/or Clearfield® canola) making it very difficult to control. This can leave you with a poorperforming, lower quality crop which can compromise your return on investment.

2013 Performance % Control of RR Volunteers

ighter canola rotations and increasingly common prairie wind events have lead to massive volunteer canola seed deposits across the Canadian prairies.

Pardner (400 ml/ac)+ Glyphosate

Pardner (500 ml/ac)+ Glyphosate

50 CleanStart® Low Rate Source: 2013 D&L - HD13CANBGA (n=6)

CleanStart® High Rate *Pending registration

Best practices In addition to using Pardner with glyphosate for a pre-seed application, an integrated volunteer management approach is recommended, which includes: • Keeping accurate records of the type of canola planted each year • Anticipating volunteer canola in every field • Expecting volunteer canola to

be resistant to specific herbicide technologies • Rotating to non-susceptible crops between canola rotations • Reducing deep tillage following harvest to facilitate frost-kill of volunteer seedlings To learn more about volunteer canola management and Pardner herbicide, please visit BayerCropScience.ca/ Pardner

The 2014 BayerValue program allows you to combine your Cereal Winter Sale, Early Book InVigor and Cereal Savings purchases to maximize your rewards. Now when you purchase almost any Bayer CropScience product you increase your opportunity to save. For full offer details, and to learn more visit - BayerCropScience.ca/BayerValue

BayerCropScience.ca or 1 888-283-6847 or contact your Bayer CropScience representative. Always read and follow label directions. Infinity®, LibertyLink®, Pardner® and Tundra® are trademarks of the Bayer Group. All other products are trademarks of their respective companies. Bayer CropScience is a member of CropLife Canada. *

Source: 2013 Bayer CropScience D&L Trials, n=6

FARM FORUM / SPRING 2014