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
CropLife 100Allied 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
FungicidesReport: Sudden Death Syndrome Symptoms Appearing In Soy…
July 30, 2015
Last week, symptoms of sudden death syndrome (SDS) began to appear in April 15-planted soybeans at the University of Illinois’s Read More
Seed/BiotechAdvanta Seeds Adds New Phoenix Corn Hybrids
July 30, 2015
Corn growers in the High Plains and Western states have new options available for the 2016 growing season from Advanta Read More
ManagementTechnology and agriculture: a Futurist’s Perspective
July 30, 2015
Futurist David Zach, speaking at this week’s InfoAg Conference in St. Louis, shared thoughts on the benefits and limitations of Read More
Biofuels Plant in Lousiana
Industry NewsIdle Biofuels Plant In Louisiana To Reopen As Ammonia F…
July 30, 2015
A Lithuania-based company plans to spend $265 million to reopen an idle biofuels refinery in Grant Parish as an ammonia Read More
FFA at Monsanto Booth at the 2015 National Farm Machinery Show
Industry NewsFive Students Receive The 2015 Monty’s Plant Food Compa…
July 29, 2015
This fall, five college-bound students will have financial support through the Monty’s Plant Food Company FFA Scholarship. All five scholarship Read More
GYPSOIL Blendable Pellets
Crop InputsBeneficial Reuse Management Launches Pelletized Gypsum …
July 29, 2015
Beneficial Reuse Management (BRM) announced this week at Ag Media Summit that its GYPSOIL Pelletized Products Division will open a Read More
StewardshipOhio Water Quality Project To Determine How Much Phosph…
July 27, 2015
Researchers with the College of Food, Agricultural, and Environmental Sciences at The Ohio State University are looking for farmers in Read More
FertilizerKoch Agronomic Services Launches N-TEGRATION Technology
July 27, 2015
Koch Agronomic Services, LLC (KAS) has launched  N-TEGRATION Technology, a process technology platform designed to enable production of enhanced efficiency fertilizers at Read More
HerbicidesExpert: IARC Herbicide Classifications Leading To Confu…
July 24, 2015
Few people in the crop protection industry had heard of the International Agency for Research on Cancer (IARC) before this Read More
ManagementFCI Trade Summit Update & Precision Tank Turns 50
July 23, 2015
Editors Dave Frabotta and Eric Sfiligoj discuss the upcoming FCI Trade Summit in Las Vegas, NV, and how Precision Tank Read More
Palmer pigweed seedhead in cotton
HerbicidesUSDA Deregulates Dow AgroSciences’ Enlist Cotton Trait
July 23, 2015
The USDA today issued its decision deregulating Dow AgroSciences’ Enlist cotton trait in the U.S. The USDA has now completed its Read More
Industry NewsVerdesian Life Sciences Showcases Versatile Product Por…
July 23, 2015
Technology has revolutionized agriculture by bringing farmers, retailers and distributors to the forefront of the digital age. To meet the Read More
FertilizerWSJ: Cf Industries Exploring Merger With Dutch Chemical…
July 23, 2015
U.S. fertilizer maker CF Industries is in advanced merger talks with Amsterdam-listed chemical company OCI NV, the Wall Street Journal Read More
HerbicidesNufarm Releases New Panther SC Herbicide
July 23, 2015
Nufarm has announced the availability of new Panther SC herbicide. Panther SC is the first liquid formulation of flumioxazin available Read More
EquipmentFarmLink Launches Farm Equipment Sharing Program
July 23, 2015
FarmLink has introduced a new online farm equipment sharing community – MachineryLink Sharing – leveraging this new economy business model Read More
HerbicidesCould The South’s Most Troublesome Weed Represent A Thr…
July 22, 2015
Palmer amaranth is undoubtedly the most troublesome weed in the southern United States, taking a devastating toll on both cotton Read More
Industry NewsH.J. Baker Hires New Director Of International Sales
July 22, 2015
Global Agriculture firm H.J. Baker announced today that Steve Langley has joined the company’s Crop Performance Division and Animal Health Read More