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

InsecticidesHow To Scout For Corn Earworms In Corn
July 28, 2014
In her weekly report, University of Missouri Agronomy Specialist Jill Scheidt discusses what to look for when scouting for corn earworm. Read More
InsecticidesEPA Grants Besiege Insecticide Additional Approvals
June 18, 2014
EPA has granted additional registration approvals for the use of Syngenta's Besiege insecticide on sorghum, cereal grains and peanuts. Read More
InsecticidesPrevathon Insect Control Approved For Cereal Crops
January 13, 2014
DuPont's Prevathon insect control powered by Rynaxypyr has received U.S. EPA registration for use on cereal crops, including wheat, most other small grains and sorghum. Read More
InsecticidesInsecticides 2014: Insect Pressure, Solutions On The Rise
January 2, 2014
Bt resistance, weather concerns and myriad other issues have led to an increase in both traditional pest pressures as well as new pests. Read More

Trending Articles

Crop InputsPlatform Specialty Products To Acquire Arysta LifeScience
October 20, 2014
Once the acquisition is complete, Platform Specialty Products will combine Arysta LifeScience with previously acquired companies Agriphar and Chemtura Crop Solutions. Read More
Seed/BiotechMonsanto Offers New Support For Ferguson, Area Communities
October 8, 2014
Monsanto Co. has committed $1 million in new support for several collaborative efforts in Ferguson, MO, and surrounding communities in North St. Louis County. Read More
Seed/BiotechUnapproved Genetically Modified Wheat Found In Montana
October 3, 2014
USDA reports that one year after discovery of Monsanto's unapproved wheat in a single Oregon field disrupted U.S. wheat export sales, the GMO wheat has again been found in Montana. Read More
Equipment2014 Product Of The Year Voting
September 19, 2014
The deadline to vote for the 2014 CropLife IRON Product of the Year is October 31. Please cast your vote today to help us determine the winner. Read More
FertilizerFall Fertility 2014: Forecasting Fertilizer Use
September 7, 2014
Great crops this year have tapped the soil, and fall work is definitely called for, but how challenging will that get? Read More
CropLife 100CHS To Build $3 Billion Fertilizer Plant In North Dakota
September 5, 2014
The fertilizer plant in Spiritwood will be the single largest investment in CHS history, as well as the single largest private investment project ever undertaken in North Dakota. Read More

Latest News

CropLife 100ValueAct Buys Stake In Fertilizer Dealer Agrium
October 30, 2014
ValueAct has bought 8.2 million shares in Calgary, Alberta-based Agrium, making them the second largest investor in the fertilizer dealer. Read More
InsecticidesNew Research Study Shows The Value Of Neonics
October 29, 2014
The study evaluated seed treatment, soil and foliar uses of neonicotinoid insecticides in the U.S. and Canada. Read More
StewardshipUSDA To Provide $4 Million For Honey Bee Habitat
October 29, 2014
Agriculture Secretary Tom Vilsack announced today that more than $4 million in technical and financial assistance will be provided to Read More
Crop InputsValent Launches New Low VOC ProGibb LV Plus Plant Growt…
October 29, 2014
ProGibb LV Plus PGR is a high-potency, liquid gibberellic acid formulation designed to comply with California’s new air quality standards for high volatile organic compound agricultural products. Read More
Crop InputsBayer CropScience Acquires Certain DuPont Crop Protecti…
October 29, 2014
Bayer CropScience and DuPont Crop Protection have signed an agreement for Bayer to purchase certain DuPont Crop Protection Land Management assets in the U.S., Canada, Mexico, Australia and New Zealand. Read More
ManagementWest Central Names New President
October 29, 2014
West Central’s board of directors have announced their unanimous decision to name Milan Kucerak President and CEO-elect following Jeff Stroburg’s retirement at the end of the fiscal year. Read More
InsecticidesValent U.S.A., MGK Form Marketing Agreement
October 24, 2014
Valent has formed an agreement with Minneapolis-based MGK to manage the marketing and sales of MGK’s crop protection line of insect control products within the U.S. beginning April 1, 2015. Read More
StewardshipFlorida’s 4R Advocate Keeps Improving
October 24, 2014
Florida farmer Alan Jones uses the 4R principles of nutrient stewardship as the core of his fertility program, which allows him to maximize production and keep costs in check. Read More
Seed/BiotechMonsanto Named One Of The World’s Best Multinational …
October 23, 2014
Monsanto ranked No. 8 in the world’s largest annual study of workplace excellence that identifies the top 25 best multinational companies in terms of workplace culture. Read More
Crop InputsArysta Hires Former Agri-Chem, CPS Employee For Delta S…
October 23, 2014
New Territory Sales Manager Mark Peel’s primary role will focus on working with growers regarding fungicides in Louisiana, Mississippi, Arkansas and Tennessee. Read More
CropLife 100GROWMARK Announces Appointments In Plant Food Division
October 22, 2014
GROWMARK, Inc. has announced the three key staff changes in its Plant Food Division. Read More
CropLife 100GROWMARK Appoints New VP Of Finance And Risk Management
October 22, 2014
Wade Mittelstadt has been named GROWMARK Vice President, Financial and Risk Mangement, effective December 1, 2014. Read More
FungicidesEPA Approves BASF In-Furrow Corn Fungicide
October 22, 2014
Field trials show Xanthion In-furrow fungicide provides more rapid emergence, extended residual control and improved seedling health than untreated crops. Read More
EquipmentAgraScout App Available At No Cost To Universities
October 21, 2014
AgraScout, a fast and easy to use mobile crop scouting app, is now available at no cost to University students, Read More
LegislationNew Farm Bill Program To Provide Relief To Farmers Affe…
October 21, 2014
The USDA has implemented a new Farm Bill initiative that will provide relief to farmers affected by severe weather, including drought. Read More
ManagementGreenfield Scholars Program Aims To Sustain Agronomy Wo…
October 21, 2014
The program encourages talented students to study agronomy, crop and soil sciences while cultivating networks to develop the necessary workforce to sustain the profession. Read More
Paul SchrimpfPrecision Ag: Taking It To The Hill
October 21, 2014
A new coalition took the good news message of precision agriculture to Washington, DC, last month. Read More
ManagementUSDA Awards $18 Million In Small Business Research Gran…
October 21, 2014
The grants will provide high quality, advanced research and development that will lead to technological innovations and solutions for American agriculture. Read More