FROM THE DESK OF
THE UNITED SUPPLIERS TECHNICAL TEAM
SOYBEAN HERBICIDE TRAIT RESISTANCE TM
Four agriculture industry organizations/ collaborations currently have herbicide tolerant technology deployed in regulated/ stewarded evaluations in experimental field environments. Expected release of the technologies are approximately 2015 to 2020. The dicamba trait is deregulated but no herbicide is approved for use yet. The Enlist trait is deregulated in the US but no export approval for China yet. Each herbicide tolerant trait will be accompanied by organized education efforts and herbicide formulation technology and the commonly used term “system” will be used to describe these technologies as they mature and become available. Each herbicide trait based system will provide opportunities and challenges as the industry implements these new tools in weed control strategies. There will be some commonalities among all the soybean seed technology crop systems. One opportunity that all technologies provide is an expansion of the use and application of the herbicide products. Post application timing in soybeans with additional (modes of action) MOA’s is a big win as this is pretty limited currently. There will be less concern about crop–
to-crop changes and application timing as trait tolerance in soybean seed will enhance the window of application of these chemistries. Ultimately each organizations trait package offers a tool in weed resistance/ control technology but none are standalone applications. They enhance the opportunity for multiple modes of action in the tank mix which is a primary tool in the battle against resistance. Common challenges are ensuring the right herbicide is on the right acre as seed technology is deployed. There is simply more opportunity for misapplication with multiple tolerant herbicide technologies. Growers and retailers have adapted to this previously so this is not new, but adds more variables. This technology is highly scrutinized by regulators. Expect requirements on labels related to buffer zones, nozzle types, wind direction and speed to surface as this moves forward. Each herbicide mentioned has known resistance globally. There are no silver bullets. Tools will need to be accompanied by a complete strategy to manage weeds and maintain the technology.
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Soybean Plant Herbicide Tolerant Seed Technology Systems Traits will confer tolerance in the soybean plant to the following herbicides: • Monsanto - Roundup Ready® Xtend™ Crop System • Dow AgroSciences LLC Enlist™ Weed Control System & DowAgroSciences & MS Technologies LLC - Enlist E3™ Soybean • Bayer CropScience & MS Technologies LLC - Balance GT Soybean Performance System • Syngenta & Bayer CropScience - MGI herbicide-tolerant soybean plants wither and die
“Expected release of these technologies is somewhere between 2015 to 2020.”
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MONSANTO ROUNDUP READY® XTEND™ CROP SYSTEM Seed Technology This specific soybean seed technology will confer tolerance to glyphosate and dicamba. Both products are widely used today in row crop systems. However dicamba use is currently limited in soybeans to burndown applications and must be at least 14 days before the crop is planted. This technology will expand that window of application as the trait confers tolerance up to planting and over the top application early in the soybean crop.
HERBICIDE SYSTEM Monsanto will offer two herbicide products-Roundup Xtend™ that will be a premix of glyphosate and and dicamba in a low volatility formulation, and the Xtendimax™ herbicide product which will be a low volatility dicamba product. BASF will offer Engenia™, which is a new, low volatile formulation of dicamba. These newly developed formulations for dicamba tolerant cropping systems that are anticipated to be labeled for use alone, sequentially or tank mixed with other herbicides to effectively control weeds. Dicamba is a site of action group 4-growth regulator chemistry that is selective with approximately 10 known resistant weed species. Glyphosate is a site of action group 9-growth regulator chemistry that is non-selective and is an amino acid synthesis inhibitor with approximately 13 known resistant species in the US.
Opportunities
Challenges
Dicamba will be a tool for many challenging broadleaf weeds in the soybean cropping system and will be accompanied by a larger window of application opportunity; from burndown, to pre-plant to early post. This will help address flushes of weeds that emerge as different soil conditions and temperatures occur. Additionally, two of the largest seed and three of the largest crop protection organizations have agreed to deploy this technology; signaling this should be readily accessible.
Dicamba and glyphosate are some of the most notable chemistries that have caused drift concerns in the past. New formulations, label requirements and intense education to accompany the system will lessen the bumps along the way. Dicamba has posed a concern of not being properly cleaned out of poly tanks. Expect the industry to answer with tank cleaning products than minimize potential contamination. There are resistant weeds to glyphosate and dicamba. A major weed that is resistant to dicamba is kochia in western US states. This will be a tool to use in a strategy and not stand alone weed control treatments. Adjuvants will require approval to be used in combination with these new herbicide formulations. AMS and products that reduce spray pH will not be allowed to be used. The industry will answer with products moving forward.
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Seed Technology Traits will confer tolerance in the soybean plant to the following herbicides: • Glypohsate (Commonly known as Roundup®) • Dicamba (Commonly known as Banvel® or Clarity®)
Herbicide System • Roundup® Xtend (Monsanto • XtendiMax™ (Monsanto) • Engenia™ (BASF)
Opportunities & Challenges Opportunities: • Tool for resistant broadleaves • Wide application window • Wide distribution of technology Challenges: • Drift & non target concerns • Spray tank cleaning • Resistance development from wide/repeated use • Adjuvants
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ENLIST SOYBEANS W/ROUNDUP READY 2 YIELD® & E3™ ENLIST™ WEED CONTROL SYSTEM Seed Technology
The Enlist Soybeans with Round Up Ready 2 Yield will be tolerant to glyphosate and 2,4-D choline. There will be a marker in this soybean that conveys tolerance to glufosinate, but this will not be marketed or licensed to include this in specific seed technology. The Enlist E3 soybean is a molecular stack that confers tolerance to glyphosate, glufosinate and 2,4-D. This likely will be the first “triple stacked” herbicide tolerance trait that growers will see commercialized, but count on other industry organizations to go in a similar direction in multiple herbicide stacked traits as breeding efforts and agreements among organizations advance.
HERBICIDE SYSTEM Enlist Duo is the accompanying herbicide system that is used with the seed technology. This formulation includes glyphosate, a group 9 site of action non selective herbicide, and 2,4-D, a group 4 site of action like dicamba but a phenoxy herbicide, which has a long history of use in agriculture industry on broadleaf weeds. Dow has a new formulation labeled 2-4-D Choline that is a low volatile formulation. Again, there are about 10 weed species in the US that are currently resistant to this particular herbicide that are of consequence in a monoculture. There will be more to come in formulations as agreements between organizations are reached and products to match seed technology are deployed.
Challenges
Many of the opportunities that exist with the Xtend™ system are similar for Enlist™ soybeans. An additional opportunity will be the E3 soybean that will convey tolerance to two nonselective herbicides.
One challenge is the creeping up in herbicide rates for 2,4-D that has been ongoing as resistant and troublesome weeds grow in acres. As wide spread use of the new formulation is deployed this likely will continue.
SUMMARY
Opportunities
These tools are in our near future. It is key to understand what they bring to the table in weed control strategies for planning. These crop systems will be accompanied by some of the best opportunities ever seen in the industry. There is a new era of “getting it right” commitment by organizations as they navigate the regulatory process and deploy technologies to growers. Now is the time to plan for the new technologies. Initiate a dialog with seed and crop protection providers to understand what tool will work best in your business or operation.
“Now is the time to plan for the new technologies!”
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Seed Technology Traits will confer tolerance in the soybean plant to the following herbicides: • Enlist Soybeans w/Roundup Ready 2 Yield® • Glyphosate (Commonly known as Roundup®) • 2,4-D • Enlist E3™ Soybean • Glyphosate (Commonly known as Roundup®) • 2,4-D • Glufosinate (Commonly known as Liberty®)
Herbicide System • Proprietary blend of glyphosate and new 2,4-D choline • Other products in development
Opportunities & Challenges Opportunities: • Tool for resistant broadleaves • Wide application window • Two non-selective herbicide options Challenges: • Drift & non target concerns • Rates, a.i. effectiveness • Resistance development from wide/repeated use