BASF Survey: Focus On Herbicide Site Of Action To Eradicate Weed Resistance

Respect The Rotation Plot TourWeed control today is more complex and difficult than it was for past generations. Not only do today’s growers need to prepare to face difficult weeds, an increasing number also face herbicide resistance. In fact, three out of four growers who participated in a recent BASF survey suspect that glyphosate resistance is a cause of tough-to-control weeds. A key element to combatting resistance is the herbicide site of action.

Herbicide-resistant weeds became a problem when growers depended on a single-herbicide program over a long period of time without supplementing any significant cultural practices, such as tillage. As the same herbicide was applied year after year, weeds were progressively selected for resistance because only one herbicide site of action was used.

Many wonder about the difference between site of action and mode of action. The site of action is the location within the plant where the herbicide impacts the development process. The mode of action is the name for the process the herbicide uses to control the weed. So site of action is “where” and mode of action is “how.”

“The site of action is the location in the plant where the herbicide has its primary effect,” said Bryan Young, Ph.D., Associate Professor of weed science, Purdue University. “Typically, the target is an enzyme used in carrying out a process like amino acid production or photosynthesis. The herbicide targets that enzyme and stops the process.”

Though sites of action can be referred to by the protein function they inhibit, such as acetolactate synthase (ALS) or p-hydroxyphenylpyruvate dioxygenase (HPPD) they are also grouped numerically based on their function. For example, an ALS herbicide that inhibits amino acid synthesis is labeled as Group Two. This group label is always listed on the product label.

Today, resistance exists to glyphosate, ALS and triazine.

“Because it is the key to a herbicide’s effectiveness, we recommend using a variety of effective sites of action,” said Chad Brommer, Biologist, Herbicides at BASF. “Utilizing different sites of action is like having multiple tools in your weed control tool belt.”

There are about two dozen sites of action registered today for commercial products. About half of those are available in the United States. Because of the limited number of available sites of action and the spread of weed resistance, it’s important to use overlapping effective sites of action to reduce selection pressure on any single site of action and mitigate the development of further resistant populations.

“One way to combat resistance is through rotation and diversification,” said Young. “Even if crops are rotated from year to year, the goal should be to use a diverse combination of herbicide sites of action each year with minimal overlap of any single site of action between years in the same field.”

For improved weed management, use more than one site of action and rotate herbicide usage to control weeds and prevent resistance.

For more quick tips on weed control, visit AdvancedWeedControl.basf.us.

Topics: ,

Leave a Reply

Crop Inputs Stories

Corn Field
MicronutrientsHuma Gro Introduces New Boron Liquid Nutrient Formulation For Crops
August 28, 2015
BORO-MAX, a new boron (B) 10% liquid nutrient formulation, has been added to the Huma Gro product line. This new Read More
Crop InputsNFU: Monsanto Decision To Withdraw Syngenta Bid ‘Good For Family Farmers’
August 26, 2015
National Farmers Union (NFU) President Roger Johnson said the organization was very pleased by the news that Monsanto has withdrawn Read More
Crop InputsMonsanto Withdraws Bid For Syngenta
August 26, 2015
Monsanto Co. abandoned its latest effort to acquire Syngenta AG, the world’s top maker of pesticides, after a sweetened bid Read More
Syngenta Sign
Crop InputsSyngenta Comments On Monsanto Announcement
August 26, 2015
The Board of Syngenta confirms that it received a verbal proposal from Monsanto to acquire the company at a price Read More
Top 100 Articles
Crop InputsLand ‘O Lakes, United Suppliers Finalize Merger
August 24, 2015
According to a press release on August 24, owners of United Suppliers, Inc. and members of Land O’Lakes, Inc. “have Read More
West Central Cooperative, Jefferson, IA
CropLife 100Iowa Cooperatives To Explore Unification
August 19, 2015
The boards of directors at two of Iowa’s leading farmer-owned cooperatives yesterday signed a letter of intent to study the Read More
CropLife 100Southern States Coop Hosting Drone Flight This Friday
August 3, 2015
Southern States Cooperative — No. 9 on the CropLife 100 — is hosting an FAA-approved drone demonstration at Grandview Farms Read More
CropLife 100Aligned Ag Distributors Adds Four New Owners
July 30, 2015
Aligned Ag Distributors LLC has announced the addition of four new customer/owners to Franklin Holding Co. LLC. They are: The Read More
CropLife 100Pinnacle Purchases California-Based Specialty Crops Retailer
July 20, 2015
Pinnacle Agriculture Holdings has successfully acquired California-based NH3 Service Co.  Operating as part of Pinnacle’s Performance Agriculture brand, the new locations Read More
Asmus Farm Supply liquid fertilizer facility features 20,000 square feet
CropLife 100Slideshow: Asmus Farm Supply Shows Off Its New Liquid Fertilizer Facility
July 15, 2015
Asmus Farm Supply, Rake, IA, recently added a new liquid fertilizer facility to its company operations. The new liquid fertilizer Read More
Latest News
Corn Field
MicronutrientsHuma Gro Introduces New Boron Liquid Nutrient Formulati…
August 28, 2015
BORO-MAX, a new boron (B) 10% liquid nutrient formulation, has been added to the Huma Gro product line. This new Read More
Crop InputsNFU: Monsanto Decision To Withdraw Syngenta Bid ‘…
August 26, 2015
National Farmers Union (NFU) President Roger Johnson said the organization was very pleased by the news that Monsanto has withdrawn Read More
Crop InputsMonsanto Withdraws Bid For Syngenta
August 26, 2015
Monsanto Co. abandoned its latest effort to acquire Syngenta AG, the world’s top maker of pesticides, after a sweetened bid Read More
Syngenta Sign
Crop InputsSyngenta Comments On Monsanto Announcement
August 26, 2015
The Board of Syngenta confirms that it received a verbal proposal from Monsanto to acquire the company at a price Read More
Case IH Patriot 2250 Sprayer
EquipmentHigh-powered Case IH Patriot 2250 Sprayer Pushes Throug…
August 26, 2015
Engineered with more muscle, the new 660-gallon-capacity Patriot 2250 sprayer features best-in-class horsepower, along with the fuel efficiency that comes Read More
Crop InputsLand ‘O Lakes, United Suppliers Finalize Merger
August 24, 2015
According to a press release on August 24, owners of United Suppliers, Inc. and members of Land O’Lakes, Inc. “have Read More
TMX-2050 In-Cab Display Launch Run Screen
Eric SfiligojPrecision Ag Could Shine In Increased Spotlight On Agri…
August 24, 2015
By any measure, 2015 is turning into one of the most challenging years agriculture has ever experienced. All throughout good Read More
ManagementCrop Conditions In Minnesota and Traveling Time
August 21, 2015
Editors Paul Schrimpf and Eric Sfiilgoj discuss the crop outlook from a field trip to Minnesota and upcoming travel plans. Read More
HerbicidesREUTERS: Anti-GMO ‘Scientist’ Calls For New…
August 20, 2015
EDITORS NOTE: We feel that it is important to note that there are those that believe one of the lead Read More
Rendering of Syngenta Seedcare Institute expansion
Seed/BiotechSyngenta Announces Seedcare Application And Resource Ce…
August 19, 2015
Syngenta recently announced the Seedcare Application and Resource Center, a collaborative new website designed exclusively for Syngenta Seedcare customers to Read More
Winter Wheat
Industry NewsArysta LifeScience Announces Two New Regional Sales Man…
August 19, 2015
Arysta LifeScience North America recently announced Steve Vining and Phil Reding have each accepted new positions as Regional Sales Managers. Read More
West Central Cooperative, Jefferson, IA
CropLife 100Iowa Cooperatives To Explore Unification
August 19, 2015
The boards of directors at two of Iowa’s leading farmer-owned cooperatives yesterday signed a letter of intent to study the Read More
Golden Harvest Corn healthy leaves
Industry NewsAligned Ag Distributors Names Vice President, Crop Prot…
August 18, 2015
Aligned Ag Distributors LLC have appointed Warren Hragyil to VP Crop Protection. Hragyil comes to Aligned Ag Distributors LLC with Read More
Industry NewsH.J. Baker Hires Manager For Crop Performance Division
August 18, 2015
H.J. Baker has announced Donald Sutton has joined the company’s Crop Performance Division as a part of the U.S. sales Read More
Radish cover crop taproot
Crop InputsSoil Health Field Days Promote Agricultural Evolution
August 18, 2015
Brent Bible practiced no-till farming and the use of cover crops on his farm in Lafayette, Indiana, but until recently, Read More
Cover Crop on corn
Industry NewsMore Farmers Find Healthy Soil Works For Crops, Bottom …
August 17, 2015
Doug Toussaint’s field was in critical condition — and he was the one killing it, reports Dan Gunderson on MPRNews. Read More
Deere tillage
Crop InputsTillage Practices Have A Direct Correlation To Soil Hea…
August 17, 2015
Many areas, including Michigan, have experienced a heightened sense of awareness of the importance of soil quality, according to Michigan Read More
Eric SfiligojAn Interesting Water Issue On The West Coast
August 17, 2015
A few weeks ago at the 2015 Environmental Respect Awards event in Wilmington, DE, one of the speakers talked about Read More