Nematodes: We’re Back

After several decades of reprieve for growers, an indigenous and damaging pest is again creeping through the Corn Belt. Nematodes are making a comeback.

While traditional production practices hindered nematode populations in corn, cultural changes in today’s production have caused their recent increase. For example, more than 80 percent of Illinois soybean fields are infested with soybean cyst nematode (SCN), according to Terry Niblack, University of Illinois Extension nematologist (see “To Every SCN: Turn, Turn, Turn”).

There are three major changes that have contributed to this growth — and that will continue to encourage growth in the future.

  • First is an increase in no-till and reduced-till farming methods. Because most nematode species are sensitive to tillage, no-till and minimum-till production practices can create an environment where certain nematode species are able to flourish year after year.
  • Second is a change in rootworm management technology. Pyrethroid insecticide chemistries and corn rootworm (CRW)-traited corn don’t suppress corn nematodes as did the older carbamate and organophosphate insecticide formulations.
  • Third is an increase in corn-on-corn planting, which allows nematode populations to prosper. A rotation with alfalfa or another non-host crop can help hinder life cycles.

Damage caused by corn nematodes is difficult to identify because symptoms can easily be attributed to other causes such as herbicide injury, diseases, micronutrient deficiencies or the result of harsh environmental conditions such as drought. Some species of nematodes may not cause economic injury on their own, but can interact with other problems, such as fungal pathogens and insects, to intensify corn yield loss. Often there are no visual symptoms, but corn yield is impacted. The only way to accurately identify nematode populations is through collection and analysis of soil and root samples.

To measure the prevalence of nematodes in corn fields, Syngenta Seed Care launched a corn nematode mapping project in 2007. In the first comprehensive study of its kind in the Midwest, Syngenta Seed Care sampled three fields in each county that grows at least 25,000 acres of corn in the Midwest Corn Belt.

The fields sampled were randomly selected — the only criterion was the fields had to be at least 10 miles apart. There was no pre-selection for soil type or tillage, and the samples were taken from corn-on-corn and corn-on-soybean rotation fields.

Samples were processed by five university labs and one private lab. The results mapped intensity by species and overall nematode populations for every county included in the study. While species and populations varied, nematodes were found in every county included in the survey.

Syngenta Seed Care recognizes the threat that growers face with corn nematodes and is working to bring to market a corn seed treatment nematicide to help manage the threat of yield loss caused by corn nematodes. For more information, please contact your Syngenta Seed Care sales representative.

(Sources: Plant Management Network News/Syngenta Crop Protection)

Leave a Reply

Insecticides Stories

Crop InputsBayer: 5 Reasons We Disagree With Maryland Neonic Ban
April 12, 2016
We’re disappointed that the Maryland legislature chose not to stand up for sound science and the rights of Maryland’s homeowners Read More
Corn Earworm
FungicidesInsects And Diseases In 2016: Early Planting, More Stress
April 4, 2016
First, the good news: If we consider all the issues growers and retailers are facing right now — low commodity Read More
Crop InputsBayer: The Science Is On Our Side In Belt Insecticide Battle
April 1, 2016
You may have seen some media stories about Bayer’s current disagreement with EPA over registrations for our pesticide flubendiamide, marketed Read More
InsecticidesEPA Moves To Cancel The Insecticide Flubendiamide
March 7, 2016
The U.S. EPA is issuing a notice of intent to cancel all Bayer CropScience, LP and Nichino America, Inc., flubendiamide Read More
Trending Articles
Food IT
Industry NewsCalifornia Event Will Mix Ag And Tech Professionals To Explore IT Solutions
June 20, 2016
Silicon Valley is hot on agriculture, and an upcoming event in California will bring together the food and tech industries Read More
Monsanto Luling Plant
Eric SfiligojWhat’s Next For Monsanto?
May 31, 2016
For the folks at Monsanto’s headquarters in St. Louis, MO, it has been an eventful few weeks. Back on May Read More
Soybean Plant closeup
Industry NewsMonsanto Rejects Bayer Bid; Open To More Talks
May 25, 2016
Monsanto Co, the world’s largest seed company, turned down Bayer AG’s $62 billion acquisition bid as “incomplete and financially inadequate” Read More
Eric SfiligojPity The Monsanto Haters
May 23, 2016
An old saying goes thus: “Be careful what you wish for. You just might get it.” Given current events, there Read More
Monsanto Luling Plant
Crop InputsReport: Bayer Eyeing Monsanto For Possible Mega-Merger
May 16, 2016
Bayer AG is exploring a potential bid for U.S. competitor Monsanto Co. in a deal that would create the world’s Read More
Aerial Drone
Precision AgA Deeper Dive Into The Future Of Precision Ag
May 9, 2016
For about two decades now, through the good and the bad times, the ups and the downs inherent in agriculture, Read More
Latest News
Allen Summers Asmark Institute PSM Training
EmployeesAsmark Institute Sponsors 25 ResponsibleAg Auditor Trai…
June 21, 2016
The Asmark Institute has announced plans to provide 25 scholarships through their affiliated State fertilizer and agrichemical associations to help encourage Read More
Kennebec Elevator
CropLife 100Wheat Growers Celebrates Kennebec Elevator Grand Openin…
June 21, 2016
Over 250 patrons and guests were on hand to celebrate Wheat Growers’ Kennebec Elevator grand opening. South Dakota Secretary of Read More
Land O Lakes
Industry NewsLand O’Lakes To Acquire Ceres
June 20, 2016
Land O’ Lakes, Inc. and Ceres, Inc. have announced that they have signed a definitive merger agreement under which Land O’Lakes Read More
Food IT
Industry NewsCalifornia Event Will Mix Ag And Tech Professionals To …
June 20, 2016
Silicon Valley is hot on agriculture, and an upcoming event in California will bring together the food and tech industries Read More
LegislationVilsack Christens WinField Crop Adventure, Talks Monsan…
June 17, 2016
The WinField Crop Adventure grand opening ceremonies at Fair Oaks Farms (near Winemac, IN) welcomed USDA Secretary of Agriculture Tom Read More
Crop InputsFields of the Future: WinField Doubles Down with Agri-E…
June 16, 2016
Land O’Lakes, Inc., joined by Agriculture Secretary Tom Vilsack, today will host Fields of the Future, a live broadcast about Read More
Bayer sign
Crop InputsMonsanto Turns Back Bayer Again
June 14, 2016
Bayer AG’s bid to buy Monsanto Co. for more than $60 billion has hit an impasse that could pose a Read More
Young Corn Field
Crop NutritionNext Generation Of Nitrogen Efficiency Technology Conve…
June 13, 2016
Commodity price projections indicate farmers will continue to face tight margins again this year. Delivering higher yields and more bushels Read More
Industry NewsLa Crosse Seed Acquires Cover Crop Solutions Brand
June 10, 2016
La Crosse Seed announces that it is the new and exclusive owner of the entire family of brands of Cover Read More
ManagementTravel Plans and EU Rejection of Glyphosate, Biotech Cr…
June 9, 2016
Editors Paul Schrimpf and Eric Sfiligoj talk about upcoming trips and the latest in the European Union’s moves against glyphosate Read More
Aspire with Boron
Crop InputsStudy: Aspire with Boron Ups Alfalfa Yields
June 8, 2016
Alfalfa growers are successfully improving yields through the cutting season by applying an important micronutrient. In a recent study, The Read More
Industry NewsAGCO Announces Tragic Death of Longtime Employee
June 8, 2016
It is with deepest regret that we announce the passing of our dear friend, colleague and customer advocate-in-chief Kevin W. Read More
Wheat Field North Dakota
Industry NewsBASF Inks Northern Seed for Clearfield Wheat R&D Li…
June 6, 2016
BASF has licensed Northern Seed LLC to perform research and development of BASF’s proprietary and patented Clearfield technology in wheat. Read More
ManagementBayer/Monsanto, EU/Glyphosate, Corn/Soybeans
June 2, 2016
Editors Paul Schrimpf and Eric Sfiligoj discuss the latest regarding industry mergers, the glyphosate debate in Europe, and an update Read More
Growers looking at soybeans
Industry NewsKoch Licenses 2 Marrone Products For North American Dis…
June 2, 2016
Koch Agronomic Services (Koch), with support from its affiliate, Koch Biological Solutions, has secured exclusive rights to sell REGALIA Rx Read More
Gypsum
Industry NewsBeneficial Reuse Management Launches GYPSOIL BLENDABLE
June 2, 2016
Beneficial Reuse Management (BRM) has introduced GYPSOIL BLENDABLE, a new high-quality pelleted gypsum fertilizer that supplies 17% sulfate sulfur and Read More
StewardshipAgrible Joins Field To Market To Pursue Sustainable Sou…
June 1, 2016
Agrible, Inc. has joined Field to Market: The Alliance for Sustainable Agriculture as an associate member. As a leading multi-stakeholder Read More