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

Young corn plants in soil
Crop InputsFortenza Insecticide Seed Treatment Receives EPA Registration
May 25, 2017
Fortenza seed treatment insecticide from Syngenta has received registration approval from the U.S. EPA for use on corn and cotton Read More
Soybean aphid leaf
InsecticidesMulti-state Research Reveals IPM Best Option for Treatment of Soybean Aphids
May 17, 2017
About 89.5 million acres of soybeans will be planted across the U.S. in 2017 — a record high, according to Read More
Lygus pratensis
Crop InputsCalifornia Agriculture: What A Difference A Year Makes For Insect And Disease Control
April 3, 2017
“We finally got the rain,” David Haviland, Entomology and Pest Management Farm Advisor with the University of California Cooperative Extension, Read More
Golden Harvest Corn healthy leaves
Crop InputsFMC Emerges as DuPont Crop Protection Business Buyer, Becomes 5th Largest Ag Chemical Company
March 31, 2017
FMC Corp. and DuPont today announced the signing of a definitive agreement for FMC to acquire the portion of DuPont’s Read More
Trending Articles
Migrant farm workers
LegislationTrump: Immigration Crackdown Won’t Impact U.S. Agriculture
May 16, 2017
President Donald Trump said he would seek to keep his tough immigration enforcement policies from harming the U.S. farm industry Read More
AGCO Ratliff featured
Eric SfiligojRemembering Robert Ratliff
May 15, 2017
With all the fast-paced happenings in agriculture this spring, with multiple mergers in the works and planting season in full Read More
Case sprayer nozzle closeup
EquipmentSpray Application: A Nozzle Renaissance
May 2, 2017
If you had asked four-decade ag veteran Mark Bartel, President of Wilger Inc., just a few years ago what lay Read More
ManagementWashington Update, Dow-DuPont Earnings, and the Passing of an AGCO Legend
April 27, 2017
Editors Paul Schrimpf and Eric Sfiligoj talk about the latest Beltway news, crop protection company 1st quarter numbers, and the Read More
Crop InputsFlying Under the Radar No More, FMC Goes Big
April 13, 2017
Describing FMC as “under the radar,” admittedly, is probably a stretch. But in a snap of the fingers, FMC upped Read More
Young Corn Plants
Crop NutritionStill Hunting Yields
April 1, 2017
There’s no denying it — the agricultural marketplace today is undergoing a fundamental shift in fortunes. Not too many years Read More
Latest News
ManagementTrip Report, PSM R.I.P, and Ag’s Reaction to Federal Bu…
May 25, 2017
Editors Paul Schrimpf and Eric Sfiligoj talk about their recent travels, the end for Process Safety Management (PSM), and how Read More
Corn soil
LegislationARA Member Testifies Before Senate Ag Committee
May 25, 2017
Agricultural retailers stand on the front-lines of the American economy. As trusted advisors to America’s farmers, ag retailers are uniquely Read More
Young corn plants in soil
Crop InputsFortenza Insecticide Seed Treatment Receives EPA Regist…
May 25, 2017
Fortenza seed treatment insecticide from Syngenta has received registration approval from the U.S. EPA for use on corn and cotton Read More
ManagementFarm Market iD’s Agriculture Database Now Covers More T…
May 25, 2017
Farm Market iD, farmmarketid.com, has announced the release of its 2017 Annual Update of its farm and land database. The Read More
Food IT Fork-to-Farm
Precision AgThe Mixing Bowl Event Connects Technology, Food, and Ag…
May 24, 2017
For the fourth consecutive year, The Mixing Bowl presents FOOD IT, under the theme “Fork to Farm.” Action-oriented entrepreneurs, industry Read More
Photo credit: The United Soybean Board/The Soybean Checkoff.
Seed/BiotechKansas State University Researchers Find New Pathogens …
May 24, 2017
A single seed seems so simple. Put it in the ground, give it some care, and you’ve soon grown food. Read More
Soybean Field
HerbicidesNew Dicamba Herbicide Premix Coming Soon from Syngenta
May 24, 2017
Syngenta has announced the name of its new herbicide featuring the active ingredients of S-metolachlor and dicamba. Upon registration by Read More
Eric SfiligojMonsanto ‘Picks Its Battles’ by Nixing Deere Deal
May 23, 2017
Having been in the trade journalism game since the mid-1980s, I remember several watershed moments during my career. One of Read More
FungicidesSyngenta Launches New Seed Treatment Fungicide
May 22, 2017
Syngenta has announced the launch of PLENARIS seed treatment fungicide for the control of downy mildew in sunflower. PLENARIS contains Read More
Corn close up
Crop InputsMonsanto’s First HPPD Herbicide Garners EPA Appro…
May 19, 2017
Monsanto announced today that EPA has federally approved Harness MAX Herbicide, the first herbicide in the Monsanto portfolio to provide Read More
ManagementPrecision Planting Deal, China Developments, and Enviro…
May 18, 2017
Editors Eric Sfiligoj and Dan Jacobs discuss the latest news on John Deere’s now dead deal for Precision Planting, China’s Read More
Soybean aphid leaf
InsecticidesMulti-state Research Reveals IPM Best Option for Treatm…
May 17, 2017
About 89.5 million acres of soybeans will be planted across the U.S. in 2017 — a record high, according to Read More
GROWMARK-2017-Interns
CropLife 100GROWMARK Names 2017 Summer Interns
May 16, 2017
Forty-two college students are exploring agricultural career opportunities this summer as GROWMARK interns. They are working at FS member cooperatives Read More
Migrant farm workers
LegislationTrump: Immigration Crackdown Won’t Impact U.S. Ag…
May 16, 2017
President Donald Trump said he would seek to keep his tough immigration enforcement policies from harming the U.S. farm industry Read More
Flooded corn in Indiana
FertilizerBoth Wet and Dry Conditions Threaten Nitrogen Loss
May 15, 2017
The weather is notoriously unpredictable, leading to challenges for planting, harvesting and applying the nitrogen (N) your corn crop needs. Read More
farmer Kip Tom
Precision AgAg Tech: On the Cusp of Something Big?
May 15, 2017
The investment and ag-tech sectors’ continuing courtship of agriculture, smoldering for three or four years now, was well in evidence at Read More
AGCO Ratliff featured
Eric SfiligojRemembering Robert Ratliff
May 15, 2017
With all the fast-paced happenings in agriculture this spring, with multiple mergers in the works and planting season in full Read More
Greg Musson, Gar Tootelian
ManagementOpinion: Shaking Your Perspective in Ag Retail
May 12, 2017
Some of you I’m sure have encountered our recently retired salesman extraordinaire, Dan Bellanger. He worked in the industry for Read More