CropBooster 2.0 in the herbicide tank mix produced an average yield increase of 3.3 bushels of wheat per acre in multiple field trials. In these same experiments, CropBooster 2.0 performed better than the original CropBooster with a higher yield increase.
By allowing crop plants to restart growth or to continue growing more quickly, CropBooster 2.0 is also proven to increase yields without reducing weed control.
Click here for more information.
FMC of Canada has announced a new expanded label for Authority 480 herbicide. The new label features more registered weeds and additional crops, according to a press release.
The weeds include eastern black nightshade, a particularly troublesome weed for identity preserved (IP) soybeans, and common waterhemp – the newest glyphosate-resistant weed in Eastern Canada. There are 13 weeds on the new expanded label, such as red root pigweed, lamb’s-quarters, wild buckwheat, eastern black nightshade, common waterhemp, yellow woodsorrel, common groundsel, cleavers (suppression), Powell pigweed and common purslane.
Authority offers a new group 14 weed control option for group 2 and glyphosate resistant weeds.
Several new specialty horticulture crops have also been added to the Authority herbicide label, including chickpeas, field pea, flax and sunflowers.
Command is a Group 13 pre-emergent herbicide that will provide canola growers with residual control of cleavers and will be an integral part of an overall cleaver management program in canola. It is a liquid formulation that can be tank-mixed with glyphosate for a one pass pre-seed application.
Command can be used with any canola herbicide system.
The first known report of herbicide-resistance came in 1957 when a spreading dayflower (Commelina diffusa)growing in a Hawaiian sugarcane field was found to be resistant to a synthetic auxin herbicide. One biotype of spreading dayflower was able to withstand five times the normal treatment dosage. That same year wild carrot (Daucus carota) growing on roadsides in Ontario, Canada, was found to be resistant to some of the same synthetic auxin herbicides.
Since then, 250 species of weeds have evolved resistance to 160 different herbicides that span 23 of the 26 known herbicide mechanisms of action. They are found in 86 crops in 66 countries, making herbicide resistance a truly global problem.
“Given all the media attention paid to glyphosate, you would think it would have the greatest number of resistant weed species,” says David Shaw, PhD, a Mississippi State University weed scientist. “Though there are currently 35 weed species resistant to the amino acid synthesis inhibitor glyphosate, there are four times as many weed species resistant to ALS inhibitors and three times as many resistant to PS II inhibitors.”
Scientists say what is unique about glyphosate resistance is the severity of selection pressure for resistance development. More than 90 per cent of soybean, corn, cotton and sugar beet acres in the U.S. are glyphosate tolerant and receive glyphosate treatments – often multiple times per year.
“The sheer size of the crop acreage impacted by glyphosate-resistant weeds has made glyphosate the public face for the pervasive problem of resistance,” says Shaw. “But resistance issues are far broader than a single herbicide and were around long before glyphosate-resistant, genetically engineered crops were even introduced.”
Research shows that resistant weeds can evolve whenever a single approach to weed management is used repeatedly to the exclusion of other chemical and cultural controls – making a diverse, integrated approach to weed management the first line of defense. Many growers have had great success fighting resistance by adopting a broader range of controls.
One example is found in the experiences of U.S. cotton growers in the southern U.S. After years of relying on glyphosate for weed control, resistant Palmer amaranth (Amaranthus palmeri) began to overrun crops and caused yields to plummet. Today integrated weed management programs that use a diverse range of controls have become commonplace in cotton, despite the higher cost. Growers are using cover crops, hand-weeding, tillage, weed seed removal and herbicides with different mechanisms of action in order to keep Palmer amaranth at bay.
There have been tradeoffs. Additional herbicides, labor and fuel have tripled the cost of weed control in cotton. In addition, increased tillage has raised concerns about soil erosion from water and wind. But for now, the crop has been preserved.
“Although diversification is critical to crop sustainability, it can be difficult to make a decision to spend more on integrated weed control strategies,” says Stanley Culpepper, PhD, a weed scientist at the University of Georgia. “As a result, many of the most successful diversification efforts can be found in crops like cotton where change became an imperative.”
Culpepper says that in addition to costs, another barrier to adoption of integrated weed management is the belief by some that new types of herbicides will be invented to take the place of those no longer effective on resistant weeds. But the HPPD-inhibitors discovered in the late 1980s for use in corn crops are the last new mechanism of action to make its way out of the lab and into the market.
“It would be naïve to think we are going to spray our way out of resistance problems,” Culpepper says. “Although herbicides are a critical component for large-scale weed management, it is paramount that we surround these herbicides with diverse weed control methods in order to preserve their usefulness – not sit back and wait for something better to come along.”
Weeds defend themselves from control measures in many ways, and can adapt to our cropping systems. A winter annual cleavers is avoiding herbicide control because it germinated in fall and will be too large and difficult to kill before an herbicide is applied in the spring. Buckwheat is naturally tolerant to glyphosate, although it is not resistant. Stork’s bill can be a winter annual but it is also morphologically plastic and keeps germinating all season long. Herbicide resistance is another way a plant defends itself.
For me, the world’s greatest herbicide was – and I say that in the past tense, was – glyphosate. It’s unfortunate but in my geography it is a herbicide of the past on many driver weeds. For me Palmer amaranth is a driver weed. For you that may be kochia. That may be wild oat. That could be green foxtail.
June 17, 2016 - It's hard to find a herbicide like glyphosate. It's cheap, highly effective, and is generally regarded as one of the safest and most environmentally benign herbicides ever discovered. But a report last year that glyphosate could cause cancer has thrown its future into jeopardy. Now the European Union faces a 30 June deadline to reapprove its use, or glyphosate will not be allowed for sale. Here's a quick explanation of the issues.
Erik Stokstad with Science magazine looks at the issue.
May 5, 2016, Ontario – Over the last eight years, growers in Eastern Canada have faced an alarming and unexpected increase in resistance. Glyphosate-resistant giant ragweed, common ragweed, Canada fleabane and waterhemp are among the weeds surfacing across southern Ontario and Quebec. This upsurge in resistance is radically affecting quality and yield in corn and soybean crops and no field is immune.
“The first glyphosate-resistant weed was identified in 2008 in Ontario. Since then, glyphosate-resistant giant ragweed is now found in the six southwestern counties in Ontario,” says Peter Sikkema, professor of field crop weed management at the University of Guelph, Ridgetown Campus. “It has been identified in Essex, Kent, Lambton, Elgin and Middlesex, as well as Huron counties.”
Glyphosate-resistant Canada fleabane seed is wind dispersed, contributing to its rapid spread across southern Ontario. It is now found in 28 counties from Essex county in the southwest to Glengarry county on the Quebec border.
“Based on our research I really think that it is important that farmers incorporate multiple modes of action, on every acre every year, as part of an overall weed management strategy,” says Sikkema.
To aid in the fight against glyphosate-resistant weeds, BASF has introduced a new herbicide for corn called Armezon PRO. According to the company, it is a pre-mix of Armezon and Frontier Max that provides fast-acting, broad-spectrum residual control of both grass and broadleaf weeds for growers looking for additional modes of action and an excellent resistance management strategy.
“Armezon PRO offers a wide window of application from the one to eight leaf stage,” said Rob Miller, technical development manager, Eastern Canada, BASF, in a press release. “It must be applied with atrazine, but for growers looking for an additional activity on tough to control broadleaf weeds, substituting Marksman for atrazine will provide up to five modes of action in glyphosate-tolerant corn.”
Armezon PRO is also fast acting on conventional corn, tank-mixed with Merge up to the three leaf stage.
“If you go into the field earlier at the one to two leaf stage, there is enhanced residual control with the Marksman tank-mix,” continued Miller.
Marksman in combination with glyphosate can be used from the one to five leaf stage. The use of Marksman provides better activity on perennial weeds, as well as glyphosate-resistant species, such as Canada fleabane, giant and common ragweed and waterhemp.
“I think we can confidently say that there will be additional glyphosate-resistant weeds found in the province in the future and the current glyphosate-resistant weeds will be found over a wider geographic area,” said Sikkema. “I think it’s very important that farmers have a diverse crop rotation to reduce the selection intensity for glyphosate-resistant weeds.”
Apr. 29, 2016 - A number of public weed surveys show us that herbicide resistance is an ongoing concern for Western Canadian growers. Glyphosate (Group 9) resistance and Group 2 resistance is continuing to spread and causing concerns for growers. There are 19 resistant weed species in Saskatchewan alone, 23 in Alberta and 19 in Manitoba (source: Hugh Beckie, Agriculture and Agri-Food Canada).
In managing herbicide resistance, growers should be mindful of the different stages for controlling weeds within the span of the growing season. Pre-seed weed control can sometimes be overlooked and is a key consideration.
"We recommend growers tank-mix their glyphosate to improve their pre-seed herbicide application and help delay the onset of resistance," said Danielle Eastman, brand manager for western herbicides and Clearfield at BASF. "Heat LQ, a Group 14 chemistry, is a unique active for cereal growers that can be applied at higher rates for residual suppression of flushing weeds including volunteer canola and will help control other resistant weed species such as kochia and wild buckwheat. Heat LQ tank-mixed with glyphosate applied pre-seed in cereals is going to provide broadleaf weed control in as few as three to five days (depending on active growing conditions), cleaning up those fields for cereal crops to emerge."
Dennis Connor lives North of Beechy, Sask. and has learned the importance of adding another mode of action with his glyphosate to combat resistance build-up on his farm. "Narrow-leaved hawk's-beard and resistant kochia have become a problem on our farm and we feel it's important to have a second mode of action on these weeds. Heat LQ added to the glyphosate is a powerful tool. It smokes these weeds very quick and our farm is mostly under control now."
Quick pre-seed weed control can help knock out resistant weed competition. "The other advantage with Heat LQ is how fast it works in the field. The weeds are crisp in like three to four days and you know we've got them under control. We like the performance," added Connor, noting this gives his field a clean start to the season. That's an important part of managing and mitigating weed resistance.
Eastman noted that crop protection companies like BASF continue to bring new chemistries to the market and recommend growers tank-mix their chemistries with multiple effective modes of action with herbicides active on the same target species to get the best results while managing herbicide resistance.
Apr. 13, 2016 - The member companies of the Western Grains Elevator Association and the Canadian Oilseed Processors Association have individually advised that they will not accept delivery of canola grown and harvested in 2016 that has been treated with quinclorac, a pesticide used to control cleavers. Growers are encouraged to speak with their local elevator or processor for additional details.
Quinclorac is not currently a recommended control option in canola because of ongoing concerns about residue limits in one of our largest export markets. Until exporters and processors are confident that they can ship quinclorac-treated canola to China without trade concerns, growers are advised to avoid this marketing risk by using other cleavers control methods.
A well-managed, systemic approach is the best strategy for bringing cleavers under control. For more information about controlling cleavers, contact your local Canola Council agronomist.
It has come to Top Crop Manager's attention through comments from some attendees that there may have been a misinterpretation of comments related to triallate at the Herbicide Resistance Summit held on March 2nd in Saskatoon.
Since the Summit, we have reviewed the most recent herbicide resistance survey from 2007-2009 and have noted the following: eight per cent of fields in Western Canada (15 per cent of fields in Alberta, three per cent of fields in Saskatchewan and 11 per cent of fields in Manitoba) had some resistance to Group 8 herbicides, triallate's mode of action group.
Research by Hugh J. Beckie and Sakti Jana (CJPS 2000, 80: 665-667) has shown that after long term use (18 years) of triallate, resistance had developed under continuous wheat production. This explains the higher percentage of fields in central Alberta showing Group 8 resistance, where triallate had been relied upon for years in wheat-barley rotations before post-emergence Group 1 and 2 herbicides came to the market. Gowan Canada is cognizant of triallate being a medium risk herbicide in regards to resistance development and asks growers to not use the product on more than 20-25 per cent of their acres each year.
Outside of fields that have had historical overuse of triallate, it is important to clarify to growers in search of a more diversified approach to wild oat management that they consider triallate based products. A key message from the Summit was that diversity in modes of action is key for managing and reducing the risk of weed resistance, and the same holds true for wild oats. Western Canadian growers will benefit from increased diversity, whether that be non-herbicidal management tools or ensuring they use all modes of action for wild oat control.
Top Crop Manager wants to ensure all Herbicide Resistance Summit delegates know that for most western Canadian growers, triallate is a valuable component of the entire suite of tools available to them in their battle against herbicide resistance.
As the world’s largest producer and exporter of canaryseed in the world, much of it in Saskatchewan, this market is definitely for the birds. Used primarily in commercial bird feed – think budgies and canaries – for growers, one of the production priorities is weed control.
“Early in the growing season, canaryseed is not very competitive. Once it gets to the five- to six-leaf stage, it starts to become more competitive,” Bill May, research scientist with Agriculture and Agri-Food Canada (AAFC) at Indian Head, Sask., says. “Early weed control is important.”
Back in the early days of canaryseed production, researchers recognized weed control was a priority. As early as the late 1980s, research identified that canaryseed yield was reduced by competition from wild mustard, cow cockle and wild oats. However, AAFC researchers Neal Holt and Jim Hunter reported excellent crop tolerance to Pardner (bromoxynil), Buctril M (bromoxynil + MCPA), Lorox (linuron) + MCPA, Stampede (propanil) + MCPA, and Sencor (metribuzin) + MCPA. The broadleaf weed control also resulted in yields that were similar to the weed-free check. Grassy weed control from Avenge (difenzoquat) provided acceptable wild oat control in one out of two years and good crop tolerance in both years of the research.
Growers in the know, though, will recognize a dwindling list of herbicides from these 1980s trials. Stampede is gone, and more recently in 2014, the U.S. revoked the maximum residue limits (MRL) on Avenge, and it is no longer available. Plus, Linuron and Sencor are not registered on canaryseed, so choices from the early days of canaryseed production are shrinking.
In the early 2000s, May built on the previous weed control research and looked at some of the newer herbicides on newer canaryseed varieties grown in no-till production systems. Avenge was still on the market and included in the research, along with combinations of MCPA, clopyralid, fluroxypyr and florasulam. The research covered three years at Indian Head, Saskatoon and Scott, Sask.
Treatments at recommended rates (unless otherwise noted) included:
- Weed-free control
- Curtail M (MCPA and clopyralid)
- Curtail M (MCPA and clopyralid) at 2x rate
- Trophy (MCPA and fluroxypyr)
- Prestige (MCPA and clopyralid and floroxypyr)
- Frontline (MCPA and florasulam)
- Avenge and Curtail M (difenzoquat and MCPA and clopyralid)
- Avenge (difenzoquat).
A time of application at two- to three-leaf, and four- to five-leaf was also included in the research.
In the study, canaryseed had good tolerance to the various combinations of MCPA, clopyralid and fluroxypyr. Avenge applications often produced more visible crop injury than other treatments. Frontline also caused crop injury, especially at the 2x rate.
Where crop injury did occur, canaryseed exhibited the ability to compensate for early season injury by producing tillers. Injury was more likely with the early leaf stage applications. However, May says growers should consider weed pressure when looking at application timing, and if it is high, early herbicide application may be beneficial. In fact, the research showed even if injury occurred at the two- to three-leaf stage, yield was still greater than if herbicide application was delayed to the four- to five-leaf stage. He says slight injury from herbicide is less important than ensuring early application to reduce early-season weed competition.
Today’s weed control options
Today, canaryseed growers have a good selection of broadleaf herbicides to choose from, and most of them control some of the more common and tough broadleaf weeds such as cleavers, kochia, hemp-nettle, perennial thistle and dandelion. The registered broadleaf herbicides also provide good mode of action rotational options with Group 4s and a Group 6 herbicide. (See Table 1.)
May says he has seen crop injury from Group 2 herbicides like Refine Extra, and that growers should avoid using any Group 2 product on canaryseed.
“Stay with labeled broadleaf products. There are some good choices and they provide acceptable weed control,” May cautions.
Where canaryseed growers would like to see more choice is in grassy weed and volunteer cereal control. With Avenge off the market, the only grassy weed herbicide registered is the granular formulation of pre-emergent Avadex. It controls wild oats. There are no registered post-emergent grassy weed herbicides and no herbicides that can control volunteer cereals. The lack of new grassy weed herbicides coming on the market means most canaryseed production is on oilseed (except flax) and pulse crop stubble, where volunteer cereals are less of a concern.
“Avadex provides a good opportunity to rotate herbicide mode of action on wild oat. Canaryseed growers are kind of forced into rotating to the Group 8 mode of action, which is probably a good thing, as it helps to delay herbicide resistance,” May says.
Canaryseed is also sensitive to soil-residual herbicides, and growers should keep good herbicide application records to ensure proper intervals between herbicide application and canaryseed production. Wait at least 24 months after spring trifluralin or Edge, or 30 months after a fall trifluralin or Edge treatment before growing canaryseed.
Information from Saskatchewan Agriculture indicates that “canaryseed should not be seeded until at least the second season following an application of Assert or Unity. Fields treated with Ally, Glean, Amber, Muster, Everest, Sundance or Pursuit should not be sown to canaryseed until a field bioassay determines it is safe to do so. Extended periods without rainfall during the growing season may extend the re-cropping restrictions on residual products. This may also impact waiting periods for products like Odyssey that do not have restrictions for the following year under normal moisture conditions.”
After 2015’s low rainfall across a wide swath of the Prairies, crop damage from herbicide carryover loomed in the minds of those who were around in the early 2000s when crop damage was widespread. That’s unlikely to happen again, says the “Yogi Berra” of herbicide carryover, weed scientist Eric Johnson with the University of Saskatchewan.
“Based on what we know of herbicide carryover and the rainfall that we received in the summer of 2015, I would say the risk is moderate to low,” Johnson says. “The herbicide labels are reasonably good for recropping. Just follow them and you should keep the risk to a minimum.”
Johnson was around in the early 2000s, when dry weather in 2000, 2001 and 2002 meant herbicide carryover caused widespread crop damage to sensitive crops like pea and lentil. At that time, he was with Agriculture and Agri-Food Canada as a research scientist at Scott, Sask., where he conducted many studies on herbicide carryover.
The most important factors affecting herbicide breakdown are soil temperature, soil moisture, soil properties like clay, organic matter and pH, and the chemical structure of the herbicide.
“The critical period for microbial degradation of herbicides is July and August. Degradation during that period depends greatly on soil temperature and water,” Johnson explains.
He says soil temperature was fairly normal throughout the summer of 2015 with microbial activity likely close to what would be expected. Looking at precipitation in 2015, rainfall was much below normal up to June 1 across many parts of the Prairies. But the tap turned on in early July, and many areas of the Prairies ended up with normal to above normal precipitation by Oct. 5.
“By comparison, when we look at the worst years for carryover in 2000, 2001 and 2002, it was dry all summer and herbicide degradation was low,” Johnson notes. (See precipitation map below.)
Crash course in herbicide degradation
Herbicide characteristics partially explain the potential risk of herbicide carryover. The half-life of a herbicide is an important factor. The longer the half-life, the greater potential risk. While half-life is important, another key characteristic is whether the herbicide is bioavailable. Bioavailability is a measure of how available the active ingredient is for root uptake. For example, Reglone (diquat) has a long half-life of 1000 days in the soil, but has a very high sorption coefficient, meaning it is tightly bound to soil particles and not very bioactive. These characteristics provide clues to herbicide carryover, but other factors like soil texture, clay content, organic matter and pH are critical factors.
Soils high in clay content or organic matter bind herbicides more tightly, while coarse soils with low water holding capacity increase the bioavailability of the herbicide and increase the probability of carryover injury.
Johnson says a good example comes from 2003 when he observed clopyralid (Lontrel) damage on pea. The previous summer was hot and dry, but a spring rain moved the herbicide into the soil solution, where it was bioactively available to growing plants and damaged the pea seedlings.
“The worst conditions you can have is a dry summer and fall, and then a wet spring. The peas were doing fine until a
one inch rainfall came along in the spring,” Johnson says.
Soil pH is also a very important factor in herbicide carryover. Sulfonylurea herbicides such as Ally generally dissipate faster in low pH soils. Sulfonylaminocarbonyltriazolionones like Everest and Varro are also affected by pH. Everest has less carryover in low pH soils, while Varro is more persistent in low pH soils, although Johnson has not observed carryover problems with Varro.
Simplicity herbicide, a trizolpyrimidine sulfonamide herbicide, has shown carryover issues in low pH soils in the Pacific Northwest.
Sulfentrazone (an active in Authority herbicide) and pyroxasulfone (an active in Focus herbicide) have faster dissipation in high pH soils.
Imidazolinone herbicides like Pursuit, Odyssey and Solo have seemingly contradictory characteristics when it comes to pH. Adsorption increases with pH below 6.5, making them less available for microbial degradation and supposedly less bioavailable. However, at low pH, they also desorb more readily in soil solution increasing the risk of carryover damage. Conversely, on high pH soils, they are adsorbed more slowly, but held more tightly to soil particles.
For agronomists and farmers concerned about carryover in 2016, Johnson says a soil bioassay can be helpful to predict potential for carryover; however, it is difficult to account for soil variability throughout a field. A bioassay indicating crop injury indicates the crop shouldn’t be planted, but a bioassay showing no injury does not mean you won’t see injury in non-sampled areas. Chemical analysis can provide an indication of herbicide presence in parts per million, but is not a reliable way to predict if carryover damage could occur.
When doing crop diagnostics to determine if a field has carryover damage, Johnson says the problems won’t be uniform over the entire field. Rather, areas with low clay content and low organic matter – such as hilltops – will be the first areas to show problems.
“Soil herbicide interactions are complex,” Johnson notes. “Organic matter is your friend. For 2016, follow recropping labels and the risk should be low.”
The Saskatchewan and Manitoba crop protection guides include charts cross-referencing re-cropping restrictions for residual herbicides between herbicide and crop to help make crop rotation choices easier. And in this case, you really should follow label directions.
ROOT BIOASSAYS FOR PREDICTING CROP INJURY
In the days of herbicide carryover during the dry 2000s, researchers and chemical companies investigated the use of root length soil bioassays to help predict the potential for crop damage from herbicide carryover. Anna Szmigielski and Jeff Schoenau with the University of Saskatchewan soil science department, and Eric Johnson, then with Agriculture and Agri-Food Canada, led many of the studies, which also investigated soil properties’ impacts on carryover. Paul Watson with the Alberta Research Council at Vegreville, Alta. also conducted soil bioassay research.
A soil bioassay is useful for both predicting herbicide carryover and as a diagnostic tool if herbicide carryover is suspected in a damaged crop.
Two bioassays were developed and verified for use on Prairie soils. A mustard root-length soil bioassay was proven to be effective on Group 2 ALS-inhibitors. The test involved collecting 200 grams of soil and splitting the sample into four replicates. Soil was wetted to 100 per cent field-capacity water content, hand mixed, and gently packed into a two ounce Whirl-Pak bag that was approximately eight centimetres (cm) deep and one cm thick. Six oriental mustard seeds were planted approximately two millimetres (mm) deep in each bag. The soil surface was covered with a 0.5-cm layer of plastic beads to prevent soil drying. Plants were grown for three days at room temperature, and after two days, plants were watered to 100 per cent field capacity. At the end of three days, the bag was opened, soil washed away from the roots and the length of root was measured.
In soils free of ALS-inhibitor herbicides, root length was in the range of seven cm plus/minus one cm. A root length of six cm or less in the ALS-inhibitor soils was considered to be indicative of herbicide residue.
Another soil bioassay uses sugar beet as an indicator plant for sulfentrazone and pyroxasulfone. Soil is gently packed into a two ounce Whirl-Pak bag to form a layer approximately eight cm high, six cm long and one cm wide. Six sugar beet seeds are planted at a two mm depth and grown for six days. In this case, sugar beet shoot length was used as an indicator of herbicide presence compared to a similar soil free of herbicide residue.
Unfortunately, neither of these bioassays is commercially available to farmers. Alberta Research Council used to do bioassays, but the service has been discontinued. An invaluable resource for farmers and agrologists is a publication from Alberta Agriculture and Forestry (AAF), entitled How Herbicides Work. It includes descriptions of herbicide modes of action and photos of herbicide activity. The book is available through AAF on its website: AgDex 606-2, at a cost of $35.00.
And it bears repeating: always read and follow label directions.
Mar. 18, 2016 - BASF has received registration from the Pest Management Regulatory Agency (PMRA) for Odyssey Ultra on fababeans for the 2016 growing season.
A news release from BASF states that "Odyssey Ultra combines the early-season and flushing broadleaf weed control of Odyssey with the proven, premium grassy weed control of Poast Ultra." Odyssey Ultra provides control of key grassy weeds like wild oats, volunteer cereals, Japanese brome and Quackgrass, and offers an extended application window.
Faba beans are growing in popularity and make an excellent rotational crop because it does not require extensive use of nitrogen and the introduction of this pulse crop interrupts pest cycles for growers.
For more information about Odyssey Ultra herbicide visit www.agsolutions.ca.
New herbicide product registrations and label updates continue to bring more choice to farmers, with multiple modes of action to manage weed infestations and herbicide resistance. Product information is provided by the manufacturers.
BlackHawk: Pyraflufen-ethyl (Group 14) and 2,4-D Ester (Group 4) is a newly registered, pre-formulated herbicide developed to be added to glyphosate prior to the emergence of cereal crops and soybeans. BlackHawk provides systemic and contact activity targeting Group 2 and 9 resistant kochia, volunteer canola (all herbicide tolerant varieties), and tough to kill broadleaf weeds such as wild buckwheat and cleavers.
Blitz: Florasulam (Group 2) is a newly registered herbicide to be tankmixed with glyphosate to control volunteer glyphosate tolerant canola, wild buckwheat (up to five-leaf) and top growth control of dandelion (up to six-leaf stage).
Express FX: Tribenuron (Group 2) and dicamba (Group 4) is a powerful new option for preseed weed control before spring wheat, durum and barley. Express FX offers exceptional defense against weed resistance, and control of key weeds such as kochia, dandelion, narrow-leaved hawk’s-beard, flixweed, stinkweed and volunteer canola.
GoldWing: Pyraflufen-ethyl (Group 14) and MCPA Ester (Group 4) is a pre-formulated pre-emergent herbicide designed to be mixed with glyphosate for three modes of action in one tank to manage risk of glyphosate resistance. GoldWing controls the toughest herbicide-resistant weeds including volunteer canola (all herbicide tolerant varieties), and Group 2 and 9 resistant kochia. It also has enhanced activity on tough-to-kill broadleaf weeds such as wild buckwheat and cleavers. GoldWing is registered prior to emergence of field peas, cereals and canaryseed, with further label additions coming after the 2016 season.
Hotshot: Bromoxynil (Group 6) and florasulam (Group 2) co-pack is a unique preseed herbicide designed for mixing with glyphosate for burndown of hard to control broadleaf weeds including Group 2 and 9 resistant kochia, volunteer canola (including glyphosate resistant), wild buckwheat, dandelion and narrow-leaved hawk’s-beard. For preseed applications prior to wheat (spring, winter and durum), barley or oats.
Grassy and broadleaf herbicides
GP Herbicide: Pyroxsulam (Group 2) is a highly effective graminicide addition to the PrecisionPac portfolio. It controls tough grassy weeds, including Group 1 resistant wild oats and Japanese brome. When mixed with a PrecisionPac broadleaf blend it gives growers completely customized control of grassy and broadleaf weeds. For use in spring and durum wheat.
Predicade: Thifensulfuron, tribenuron (Group 2), fluroxypyr, MCPA (Group 4), thiencarbazone (Group 2). Predicade herbicide provides broad spectrum, one-pass control of both grassy and broadleaf weeds in spring and durum wheat. Multiple modes of action from five active ingredients provide proactive resistance management, along with outstanding application and re-cropping flexibility under the toughest conditions.
Solo ADV: Imazamox (Group 2) is a new liquid herbicide formulation with built-in adjuvant, replacing Solo WDG. Registered for use in Clearfield canola, Clearfield canola quality Brassica juncea, Clearfield lentils, Clearfield sunflowers and soybeans.
Squadron: Metribuzin (Group 5) is a broad spectrum herbicide registered for grass and broadleaf weed control in a wide range of crops, most notably lentils, peas, chickpeas, fababeans, soybeans and potatoes. Can work alone or in combination with recommended tank-mixes.
TraxosTwo: Pinoxaden (Group 1), clodinafop (Group 1), fluroxypyr (Group 4) and 2,4-D (Group 4) is a new cereal herbicide co-pack that provides spring wheat and durum growers in the Brown soil zone of Western Canada with fast and powerful control of tough-to-manage annual grass and broadleaf weeds. TraxosTwo contains four active ingredients through two components: the grass component contains pinoxaden and clodinafop (Group 1) for control of difficult grass weeds including wild oats, green foxtail and Persian darnel; the broadleaf component contains 2,4-D Ester and fluroxypyr (Group 4) for control of aggressive broadleaf weeds, such as kochia (including Group 2 resistant biotypes), cleavers and wild buckwheat. TraxosTwo can be applied on the crop from four-leaf stage up to the flag leaf stage.
Broadleaf weed herbicides
Enforcer MSU: Fluroxypyr (Group 4), bromoxynil (Group 6), MCPA Ester (Group 4) and thifensulfuron/tribenuron (Group 2) is a co-pack herbicide offering three herbicide groups with three unique modes of action. Enforcer MSU targets kochia, lamb’s-quarters, wild buckwheat and wild mustard, and enhances chickweed, hemp nettle, narrow-leaved hawk’s-beard and volunteer canola control, and mixes with most graminicides.
Infinity FX: Pyrasulfotole (Group 27), bromoxynil (Group 6) and fluroxypyr (Group 4). New Infinity FX combines the power of three herbicide groups, utilizing both systemic and contact activity, to increase control of cleavers and kochia. Multiple modes of action make this an exceptional resistance management tool. Registered on wheat and barley crops.
Travallas: Thifensulfuron, metsulfuron (Group 2) and fluroxypyr (Group 4) is a new liquid herbicide for use in spring wheat, durum wheat and spring barley, delivering broad spectrum control of the toughest broadleaf weeds and effective resistance management. For growers contending with hard-to-kill broadleaf weeds like Canada thistle, dandelion, kochia and cleavers in their cereal crops, Travallas delivers the right combination of performance and liquid herbicide convenience. Multiple tank-mix options are available.
Valtera: Flumioxazin (Group 14) is a pre-emergent soil-applied herbicide offering residual control in pulses and soybeans in Western Canada and is now registered for spring and fall application prior to seeding field peas, chickpeas and spring wheat. Valtera provides residual activity on several key problem weeds, including kochia, chickweed and volunteer canola.
XtendiMax: Dicamba (Group 4) herbicide with VaporGrip technology. XtendiMax is a low-volatility liquid dicamba formulation developed for use in the Roundup Ready Xtend Crop System. It helps manage weed resistance by controlling glyphosate resistant weeds, reduces early weed competition through short-term residual control, and minimizes the volatility potential. This product is intended to be tankmixed with Roundup WeatherMAX or Roundup Transorb HC herbicides to provide multiple modes of action on tough broadleaf weeds.
Stage: Diquat (Group 22) is registered to enhance crop dry down and dry immature and green weeds to facilitate harvest. Stage is registered for use on dry bean, canola, chickpea, flax, alfalfa, bird’s-foot trefoil, red and white clover, lentil, mustard, oat, peas, potato and sunflowers.
Ares: Imazamox (Group 2) and imazapyr (Group 2) has an amendment weed list to include control of chickweed and
Armezon: Topramezone (Group 27) is now registered for volunteer canola control (all types including glyphosate tolerant) and kochia control (all types including glyphosate tolerant) when Armezon is applied in tank-mix combination with glyphosate. Also amended is the water volume, from 200 L/ha to a rate range of 100 to 200 L/ha.
Barricade II: Thifensulfuron, tribenuron (Group 2) and fluroxypyr (Group 4). Label expansion includes use on winter wheat and aerial application. Now also registered for control of perennial sow thistle.
Distinct: Diflufenzopyr (Group 19) and dicamba (Group 4) has an amendment of the weed list in chemfallow at 100 g ae/ha to include redroot pigweed, lamb’s-quarters, round-leaved mallow and spiny annual sow thistle.
Everest 2.0: Flucarbazone (Group 2). Registered for control of Japanese brome and aerial application. Can now be applied to wheat from one-leaf to four-leaf two tillers by air or ground equipment for control of Japanese brome and previously labelled weeds wild oat, green foxtail, redroot pigweed, wild mustard, canola, green smartweed and shepherd’s purse.
Focus: A co-pack of carfentrazone (Group 14) and pyroxasulfone (Group 15) is a preseed/pre-emergence herbicide registered for use in corn, soybeans and now spring and winter wheat. Focus can be tankmixed with glyphosate in your burndown treatment or applied alone to the soil. There is no mechanical incorporation required. Focus will control major grass weeds, including downy and Japanese brome.
Heat WG: Saflufenicil (Group 14) now has the addition of MSO Concentrate as an alternative adjuvant to Merge.
Heat LQ: Saflufenicil (Group 14). BASF will be launching a bulk SKU of Heat LQ for pre-harvest use. One tote will treat 1,000 acres.
Odyssey Ultra: Imazamox and imazethapyr (Group 2) and sethoxydim (Group 1) is now registered for use on fababeans.
Paradigm: Arylex Active, halauxifen (Group 4) and florasulam (Group2) is registered for control of a series of new weeds in addition to those already present on the label, including Canada fleabane (up to 15 cm), flixweed (up to eight cm), stork’s bill (eight-leaf), common ragweed (one- to six-leaf), shepherd’s purse (up to 20 cm), round-leaved mallow (one- to six-leaf) and volunteer alfalfa (up to 25 cm).
Pixxaro: Arylex Active, halauxifen (Group 4), fluroxypyr (Group 4) and MCPA (Group 4) is registered for control of a series of new weeds in addition to kochia control and high performance on a wide array of broadleaf weeds. The new label weed control claims include annual sow thistle (four-leaf), Canada fleabane (up to 15 cm), flixweed (up to eight cm), stork’s bill (eight-leaf), common ragweed (one- to six-leaf), shepherd’s purse (up to 20 cm), round-leaved mallow (one- to six-leaf) and volunteer alfalfa (up to 25 cm). It is also registered for use with a wide array of both Group 1 and Group 2 graminicides.
Salute: Imazamox and imazapyr (Group 2) and clopyralid (Group 4) is the only Clearfield canola solution for high-performance broad spectrum control of grasses, annual and perennial broadleaf weeds. For 2016, the control of chickweed and stork’s bill has been added to the wide label of weeds controlled.
Simplicity GoDRI: Pyroxsulam (Group 2). Simplicity herbicide will be available as the new Simplicity GoDRI RDT formulation in 2016. It provides the same high level of grass and broadleaf weed control with the added benefit of GoDRI rapid dispersion formulation technology. This formulation provides for mixing ease, convenience of application and tank-mix flexibility. The new formulation requires smaller packaging and provides excellent mixing. The rate structure will be 28 g/ac for grass and broadleaf weed control and 21 g/ac for wild oat control only requiring a broadleaf mix partner.
Stellar XL: Florasulam (Group 2), fluroxypyr (Group 4) and MCPA (Group 4) is a new co-formulation of Stellar XC that will provide for convenience of handling in bulk containers. Stellar XL will be available in 97.1 L drums that will treat 240 acres. Stellar XL will provide the same levels of control of many tough to control broadleaf weeds in Western Canada by using multiple modes of action with activity on tough-to-control weeds such as kochia, cleavers, wild buckwheat, hemp nettle and many other common broadleaf weeds.
Odyssey WDG: Imazethapyr (Group 2) and imazamox (Group 2). Amendment of the Odyssey WDG herbicide label to include control of labelled weeds in seedling clover grown for seed production.
Poast Ultra Liquid: Sethoxydim (Group 1). Amendment of the Poast label to include control of labelled weeds in crop subgroup 13-07A (caneberries) and amendment of the PHI from 15 days to one day for the already registered use in highbush blueberries.
New for 2016, Gowan Agro Canada has purchased Edge herbicide globally, and assumed manufacturing and marketing in the western Canadian market. Edge is a proven pre-emergent residual herbicide providing early weed removal and long-term control of grassy and broadleaf weeds. With a Group 3 mode of action, Edge is an excellent resistance management tool. It is registered for use in canola, peas, lentils, fababeans, mustard and
Gowan Agro Canada has also purchased Treflan herbicide globally, and assumed manufacturing and marketing in the western Canadian market. Treflan is a proven pre-emergent residual herbicide delivering season-long control of grassy and broadleaf weeds. It is registered for use in crops such as canola, mustard, peas, lentils, flax and many specialty crops.
Pyraflufen: a novel new Group 14 active ingredient that is registered for preseed, non-residual control in many crops, including pulses, cereals and soybeans in Western Canada. The recent approval of additional crops such as lentils, field peas and canola has allowed Nufarm to introduce two new products to enhance preseed burndown: Pyraflufen is now available in a pre-formulation with BlackHawk and new GoldWing herbicides.
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Canada Young Farmers ConferenceFri Feb 24, 2017
AgExpoWed Mar 01, 2017
Central Ontario Agriculture Conference Fri Mar 03, 2017
National Farmers Union - Ontario ConventionFri Mar 03, 2017
Re-Tooling the Diagnostic Toolbox Soils and Crops 2017Mon Mar 06, 2017