Management Strategies That Worked In 2015

For better or worse, throughout many regions of the country 2015 provided the optimal growing season conditions for both crops, as well as unwanted invasive weed species, making the past few months ideal for evaluating the effectiveness of different weed control strategies.

N­eil Schumacher, Central Valley Ag (CVA) (Oak­land, NE) agronomy sales manager, says the two largest challenge weeds in his three state territory have been Roundup resistant marestail and waterhemp.

“Those two continue to express more resistance to Roundup and become more and more of a challenge each year,” he says. “We have other weed species that have some amount of resistance to Roundup throughout the state but those two seem to be the most prevalent and the most difficult for us to manage.”

The management strategies his team recommends to CVA growers to eradicate these weeds, according to Schumacher, is an always moving target.

“It’s been an evolving challenge for us, and we’ve promoted residuals and we’ve promoted fall applications for marestail,” says Schumacher. “And it’s like anything else; if you don’t see it in your own fields you assume it’s not really a problem for you.

“This year has really pronounced itself with both of those weed species just being more difficult than normal; we’ve had a lot of rain and a lot of good growing conditions for weed species. We’ve definitely gained some traction (in addressing the problem) but it’s been a challenge because Roundup was so easy for so many years, guys enjoyed that … and the cost was less expensive.”

Schumacher adds that many challenges remain for growers still grasping with the new post-glyphosate era of weed control.

“Roundup still works on some fields, but then you go to the field next door and it doesn’t work at all,” he explains. “So it’s always frustrating for growers to have the option of spending a lot less money on Roundup only then have to spend $15 to $20 more per acre on the other fields where glyphosate won’t work. So one of our big challenges has been helping the growers look at the risk and the cost of not managing it upfront vs. trying to battle both of those weeds post-season.”

Another challenge that has arisen with CVA’s altering of their herbicide resistance management plans is a shrinking window of opportunity with fall burndown applications, according to Schumacher.

“Those guys are in harvest and then any fall tillage that they might do, and we’re into our fall soil sampling program and fertilization applications, so the challenge for the herbicide program is preferably the soil is only 50 degrees or less so we don’t break that product down too much in the fall before it has a chance to work for us in the winter and into spring. That doesn’t really leave a wide window of time for us.”

Now, with the days of a one-time glyphosate application lasting the entire season long in the rearview mirror, Schumacher thinks CVA’s spring pre-emerge applications are “the fastest growing segment” of the herbicide program at the No. 13 CropLife 100-
ranked retailer.

“At least throwing in a pre-emergence with a residual, and the second step of that would be getting them to run at recommended rates instead of reduced rate (to save a little money), or at least look at coming back with a post application because both of these weed species are difficult to manage in a post-arena.”

Schumacher says he’s still seeing “a lot of water hemp poking up through soybeans” and that both the Liberty Link soybean systems and the coming dicamba and 2,4-D tolerant cropping systems “pose a lot of interest” in CVA’s trade area.

“If the dicamba is truly more manageable than it’s been in the past and doesn’t cause a lot of issues with drift and off target movement, that will probably be the one with the most potential for our guys,” Schumacher says.

Crop Protection Perspective

Valent U.S.A.’s John Pawlek, product development manager, says the company’s herbicide resistance management strategy that it recommends to growers, starts with always maintaining a full label rate of residual herbicide.

“Then the second part of that is to make sure we get the weeds when they are most easily controlled, which is at the seed or seedling stage of growth,” Pawlek continues. “And with the spread of resistant weeds continuing at a prolific pace, we also always recommend using multiple effective modes of action.”

Valent’s current anti-weed arsenal in soybeans includes Valor SX, Valor XLT, Fierce and Fierce XLT, according to Pawlek.

“In situations where there’s low weed pressure and no known history of resistant weeds, we recommend Valor SX (flumioxazin), and where we see a need to control larger seeded broadleafs and want a longer residual effect, we can go with Valor XLT (flumioxazin + chlorimuron-ethyl),” he says.

When resistant weeds enter the picture, Fierce (flumioxazin + pyroxasulfone) and Fierce XLT (flumioxazin + pyroxasulfone + chlorimuron-ethyl) are the main options depending on the circumstance.

“Fierce is great where the grower is running into annual grasses and resistant Palmer Amaranth and waterhemp — it’s two modes of action can both control that weed spectrum — and Fierce XLT is where you’re kind of bringing out the big guns with three effective modes of action. We’ve had great success with this approach.”

According to Pawlek, weed extension specialists have a three step approach to managing glyphosate, ALS or even the recently confirmed PPO resistance in soybeans.

“Academia has been very adamant about taking a three step approach: the first step is using a full rate of the residual herbicide in preemergence, then using multiple effective modes of action and finally use an overlapping residual with your postemergence application,” explains Pawlek.

Leave a Reply

3 comments on “Management Strategies That Worked In 2015

  1. Fierce XLT has 3 modes of action on PPO and ALS resistant waterhemp or Palmer?? And we wonder why farmers are confused!!

Weed Resistance Stories

Spray Drift
Special ReportsPressure’s Up On Drift Reduction
October 4, 2016
The pressure was already on for the ag industry to reduce drift. Now, after what the South experienced over the Read More
Sprayer Maintenance
Special ReportsSprayer Clean-Out Gets New Attention
October 3, 2016
In this era of glyphosate resistance, the new herbicide systems hitting the market will definitely help, say dealers, but if Read More
WinField booth Farm Progress
Special ReportsTalking Weed Management Strategies At Farm Progress 2016
October 2, 2016
The annual Farm Progress Show — this year staged in Boone, IA — is always a great place to catch Read More
Engenia soybeans
Special ReportsResistant Weeds Continue To Confound Control Efforts
October 1, 2016
In the annals of weed scientists, 2017 will mark a milestone of sorts. This will be the 60th anniversary of Read More
Trending Articles
Mike Stern
Precision AgClimate Corp. CEO Talks Retailer Support For Digital Ag
December 1, 2016
CropLife Magazine’s sister publication, AgriBusiness Global, recently sat down with Mike Stern, CEO of The Climate Corp., following the Monsanto subsidiary’s Read More
Precision AgTrimble Debuts End-to-End FMIS Platform
November 28, 2016
October’s inaugural PrecisionAg Vision Conference left this author with many thoughts and things to ponder in the coming months. Probably Read More
CHS Primeland
CropLife 100The 2016 CropLife 100 Report: Reviewing The Many Bulls And Bears Impacting This Year’s Marketplace
November 28, 2016
For virtually all of 2016, the nation was wholly focused on the big Presidential election. Some folks aligned themselves with Read More
Monsanto sign
Crop InputsMissouri Governor Meets With Bayer CEO To Discuss Monsanto Merger
November 21, 2016
Missouri Gov. Jay Nixon visited Bayer AG global headquarters in Leverkusen, Germany, on November 18 to discuss the proposed Bayer-Monsanto Read More
STS16 2017
SprayersHagie Manufacturing Releases 2017 STS16 Sprayer To Market
November 16, 2016
Hagie Manufacturing LLC’s largest full season applicator is now available with enhancements for the 2017 model year. Hagie is officially Read More
Wilco
CropLife 100Valley Agronomics, Wilco-Winfield To Form New Agronomy Joint Venture
November 11, 2016
Valley Agronomics LLC, headquartered in Rupert, ID, is a joint venture between Valley Wide Cooperative and Winfield Solutions, LLC. Wilco-Winfield, Read More
Latest News
HerbicidesHerbicides 2017: New Cropping Systems Set For Debut
December 7, 2016
Herbicide-resistant weed are inching ever-closer to a potentially frightening saturation point here in the U.S. Heading into 2016, USDA planting Read More
CropLife 100Wilbur-Ellis Acquires Michigan Ag Retailer
December 7, 2016
Wilbur-Ellis’ Agribusiness, a recognized leader in precision agriculture technology and the distribution and marketing of plant protection, seed and nutritional Read More
Fertilizer storage The Andersons
CropLife 1002016 Fertilizer Report: Another Really Rough Year For A…
December 7, 2016
In many ways, the fertilizer category cannot seem to catch a break. During the early part of the 2010s decade, Read More
R4023 Sprayer, John Deere
CropLife 100Ag Retail Equipment Report: The Green Party Continues
December 7, 2016
In the annual race for sales in the ag retail equipment marketplace, the color schemes for participants are a little Read More
Winter wheat
HerbicidesTalinor Herbicide Approved For Wheat And Barley
December 7, 2016
Talinor herbicide from Syngenta has received federal registration from the U.S. EPA, giving wheat and barley growers a new option Read More
Forage Sorghum
UncategorizedMilestone Achievement Continues For Dow AgroSciences, A…
December 7, 2016
New and innovative forage products are on the horizon driven by continued collaboration between Dow AgroSciences, a wholly owned subsidiary Read More
Palmer pigweed seedhead in cotton
HerbicidesNew WSSA Factsheet Explores Weed Seeds And Their Longev…
December 7, 2016
Did you know some weed seeds can lie dormant in the soil for more than a century and then sprout Read More
Crop InputsARA 2016: 5 Developments Worth Monitoring Into 2017
December 6, 2016
You can pretty much set your watch to it (do people even still wear watches? I know I do…but I’m Read More
Tim McCardle, ARA Chairman
CropLife 100BRANDT COO Named ARA Chairman
December 5, 2016
BRANDT EVP and Chief Operating Officer Tim McArdle has been named chairman of the Agricultural Retailers Association (ARA) during a Read More
Crop InputsWilbur-Ellis Receives ResponsibleAg Certification At Mo…
December 5, 2016
Wilbur-Ellis Co., a recognized leader in precision agriculture technology and the distribution of crop protection products, announces the ResponsibleAg certification Read More
Young Corn Closeup
Eric SfiligojThe Read On 2017 For Agricultural Fortunes Is Anybody’s…
December 5, 2016
As I (and others) have written in recent months, the nation has just experienced one of the most offbeat election Read More
Acceleron B-300 seed coating
Crop InputsThe BioAg Alliance Launches New Yield-Boosting Microbia…
December 5, 2016
As part of their commitment to develop and commercialize innovative microbial solutions for farmers through The BioAg Alliance, Monsanto Co. Read More
ManagementCorn and soy planting update; Takeaways from Climate Co…
December 2, 2016
AgriBusiness Global Editor Dave Frabotta Joins Paul Schrimpf for a discussion of global corn and soybean planting trends, and a Read More
Radish cover crop taproot
Crop InputsSoil Health Institute, Datu Research Receive Grant To E…
December 1, 2016
The Soil Health Institute (SHI) and Datu Research have announced a $626,000 grant from the Walton Family Foundation to quantify the Read More
Mike Stern
Precision AgClimate Corp. CEO Talks Retailer Support For Digital Ag
December 1, 2016
CropLife Magazine’s sister publication, AgriBusiness Global, recently sat down with Mike Stern, CEO of The Climate Corp., following the Monsanto subsidiary’s Read More
ManagementAg Industry Comes Together To Address Climate Change
December 1, 2016
Addressing climate change — and more specifically, decreasing greenhouse gas emissions from agriculture — can only be achieved through collective Read More
Young soybean field
HerbicidesLiquid Formulation Valor EZ Herbicide Available For 201…
December 1, 2016
Valent U.S.A. Corp. has released Valor EZ; a liquid formulation of the company’s leading herbicide, Valor. Named Valor EZ Herbicide Read More
Key Cooperative Marcus Construction Steel Building
ManagementThe Value Of Cooperatives In Modern Agriculture
December 1, 2016
Editor’s Note: Jaxon Mullinnix of  Lone Tree, IA, was recently named the Iowa state winner of the 2017 GROWMARK essay Read More