Insect Protection Combo Boosts Yields

Treating corn rootworm hybrids with soil insecticides boosted yields an average of 12 bushels per acre in university trials across the Corn Belt in 2007.

The 17 yield comparisons — which were conducted by university researchers at the University of Illinois, Purdue University, The Ohio State University, the University of Nebraska, and the University of Wisconsin — compared YieldGard and Herculex trait corn alone and in combination with various soil insecticides. Insecticides included Counter 15G, Fortress 5G, Aztec 4.67G, and Force 3G applied with the SmartBox closed handling and application system.

"Based on these results, most farmers would realize a very positive return on investment," says Paul Vaculin, marketing manager for granular insecticides and closed delivery systems at AMVAC Chemical Corp., which sponsored the trials. "In this high-value market, it can be a sound business practice to make an extra investment to maximize yields."

AMVAC undertook sponsorship of the trials at the request of growers, who had noticed a yield benefit from applying insecticides to corn with in-plant corn rootworm protection. "We wanted to test this idea to see if it was valid," says Vaculin.

"The university trials were not designed to determine why the soil insecticides improved yields. However, a combination of factors could be responsible," says Rich Porter, AMVAC’s technical manager for granular insecticides.

"In addition to controlling corn rootworm larvae, all of the soil insecticides in the trials control secondary insect pests, such as wireworms and grubs," Porter adds. "Since Counter is also a nematicide, suppression of corn nematodes could be a factor in trials where Counter was applied. Any or all of these factors could be at play in individual trials. Variable environmental conditions, as well as differences in pest spectrum and infestation level, could affect the yield boost seen on individual grower fields."

"In a small number of trials, the rootworm trait was challenged," Porter says. "In those trials, the addition of the granular insecticide substantially reduced root feeding and held a higher percentage of roots below an economic threshold."

"Besides protecting yield, using a soil insecticide in conjunction with rootworm hybrids also may be a sound strategy for managing development of resistant insects," Porter continues. "If a soil insecticide is present, it has the opportunity to control rootworm larvae that are not affected by feeding on the Bt (Bacillus thuringiensis) toxin in corn roots. This has the potential of reducing proliferation of resistant rootworm biotypes."

In most of the 2007 trials, soil insecticides were applied at lower labeled rates — typically at three-quarters of the full rate recommended to control rootworms. For 2008, AMVAC is recommending an application of low label rates of Counter or Fortress in conjunction with rootworm hybrids. At a three-quarter rate, these insecticides typically cost about $15 per acre.
 

Leave a Reply

Latest News
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 has announced a $626,000 grant from the Walton Family Foundation to quantify 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
AGCO Operator of the Year Tony Kornder
SprayersAGCO Names Tony Kornder Operator Of The Year
December 1, 2016
AGCO Corp. names Tony Kornder with Genesis Growing Solutions in Le Sueur, MN, the 11th annual Operator of the Year. Read More
Chris Henney OABA
ManagementOABA Industry Conference To Provide Outlook For Future …
November 29, 2016
The upcoming Ohio AgriBusiness Association Industry Conference is packed with widely-respected speakers and industry professionals, sharing their expertise on a Read More
Corn
InsecticidesMajor Review Finds Neonic Poses Low Risk To Aquatic Inv…
November 28, 2016
A major new ecotoxicological review and risk assessment has been published in the peer-reviewed literature and concluded that registered crop Read More
EquipmentGSI Details New Grain Drying Efficiency System for Coop…
November 28, 2016
Grain elevators and ag co-ops are always looking for ways to increase their energy efficiency to help improve profitability. For 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
AGCO AgControl system
Precision AgPrecision Ag Technology: Rate Control For The Times
November 28, 2016
It’s not surprising that the need for more economical, effective application is driving the demand for the latest rate controllers Read More
ARA
Eric SfiligojTaking The Industry’s Pulse At ARA
November 28, 2016
When most of you read this particular column, many of the industry’s key folks will probably be spending at least Read More
CHS Primeland
CropLife 100The 2016 CropLife 100 Report: Reviewing The Many Bulls …
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
FertilizerNutrient Management, Conservation Among Topics Covered …
November 23, 2016
Certified crop advisers, consultants, farmers, agribusiness professionals and students will learn more about nutrient management, soil and water conservation, pest Read More
Monsanto sign
Crop InputsMissouri Governor Meets With Bayer CEO To Discuss Monsa…
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
Arysta LifeScience
Crop InputsArysta LifeScience Forms Alliance With Beem Biologics
November 21, 2016
As part of its recently announced strategy to become a leader in high-value, high-growth specialty market segments in the crop Read More
DuPont sign
Crop InputsDuPont To End Pension Contribution For Active Employees
November 18, 2016
DuPont will no longer contribute to active employees’ pension plans, a move that will affect the retirement of 13,000 workers, Read More