Iowa: Widespread Soybean Sudden Death Syndrome

Soybean Sudden Death Syndrome (SDS) is widespread in Iowa, according to a Iowa State University researcher.

“This year has had one of the worst epidemics since the disease was found in Iowa in 1994,” says XB Yang, professor, Department of Plant Pathology, Iowa State University. “Severely infested soybean fields can be found in every region in Iowa. It is easy to spot brown patches caused by SDS while you are driving the highways. Fields with large portions of premature defoliation can be found in early August.”

The disease can be a big surprise, Yang says.

“We have made good inputs in planting, enjoyed wonderful soybeans in July and were expecting good yield; and some may have made marketing movement,” he says. “The disease suddenly turns the fields brown with sick looking plants in August. It strike us, in many ways, like white mold.

“This year’s flood reminds us of the 1993 flood, and many contribute this year’s SDS outbreaks to flooding. However, flooding is not the reason for a major outbreak. Remember, 2008 was a flood year with high prevalence of SDS, but the disease that year caused less damage than this year. Spring and June conditions this year are the key to setting up this epidemic. Early predictions made in February suggested that all parameters for this disease in the growing season were right for a widespread outbreak.”

Yang offers answers to the following commonly asked questions:

What can we do to minimize the disease this season?
Yang: There is nothing we can do about it with current measures. Everything we can do should have been done before or at planting

Can we spray fungicide to reduce losses?
Yang: The answer is No. No chemical sprays are effective in controlling this disease. It is a waste of money.

What kind of yield losses can one expect?
Yang: The losses vary from field to field and area to area, depending at what growth stage the disease shows up and how large of an area is affected. I have seen losses as high as 30 bu/ac in severely infected fields. Sometimes the losses are minimal if the disease shows up in later August. Generally severe premature defoliation can lead to 10 bu losses.

What can we do now?
Yang: This year is a very good year to polish your SDS management skills, especially variety selection. Use local information for variety selection. Resistance information from other states, especially from field tests done in southern regions, has little use in Iowa and sometimes can be misleading, as this disease is very environmentally dependent. Look at the fields around your farm — healthy looking SDS free soybeans in flat or lowland fields that were planted earlier. That field likely has a good variety for you. I have found some varieties from certain companies do better.

Currently, there is lot of information on this disease — some good, some so-so and some is misleading. After this season, I will write an article on what to do for next year’s crop and future management.

(Source: AgNetwork)

Leave a Reply

Fungicides Stories

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
Winter Wheat
FungicidesREGALIA Rx Available from Koch Agronomic Services for 2017 Crops
May 8, 2017
Koch Agronomic Services, LLC has announced that REGALIA Rx biofungicide is available for U.S. corn, wheat and soybean growers who Read More
Crop InputsBioSafe Systems Introduces PerCarb Broad-Spectrum Bactericide / Fungicide
April 26, 2017
BioSafe Systems announces PerCarb (Sodium Carbonate Peroxyhydrate), a new alternative to potassium bicarbonate and lime sulfur products for use in 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
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
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
Exterior view of CPS Big Lake facility which includes enclosed receiving and load out area
CropLife 100New Alternative Weed Resistance Traits Could Experience…
May 12, 2017
It wasn’t too many years ago that ag retailers and their grower-customers could hardly wait for new options to fight Read More
Diane Allemang and Dan Jacobs
Crop InputsFMC Agricultural Solutions, Casa Pacifica Partner to He…
May 11, 2017
FMC Agricultural Solutions is teaming up with Casa Pacifica Centers for Children and Families, an organization that supports vulnerable children Read More
UncategorizedWhat’s Up With ARA
May 11, 2017
CropLife Editor Eric Sfiligoj talks with Brian Reuwee regarding what issues are on the docket for the Agricultural Retailers Association. Read More
BASF Maglis tablet retailer grower
Precision AgQ&A: What BASF’s Latest Foray into Precision …
May 11, 2017
In late April, BASF agreed to acquire U.S. precision ag player ZedX, a leader in the development of agronomic weather, Read More