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Be Prepared for Soybean Sudden Death Syndrome in 2019

May 7, 2019
Agtonomic image of sudden death syndrome

Sudden Death Syndrome symptoms

Between widespread flooding in the Midwest and a volatile soybean market, the 2019 season has gotten off to a rough start for a lot of growers, and you may not be certain about the conditions you will face this year. Once you do get your crop in the ground, one of the last things you want to worry about is losing your soybeans to Sudden Death Syndrome (SDS).

SDS is one of the top yield-robbing soybean diseases in the U.S., and development of the disease can be triggered by cool, wet soils. If you’ve experienced severe SDS pressure in your fields before, you know it can result in significant yield losses; the University of Minnesota Extension says losses can be greater than 50%.

Soybeans can be infected early in the season, but symptoms don’t usually appear until after flowering.  So, the plant is being infected and damaged before you’re even aware, and when symptoms do appear, it may be too late for effective management.

To reduce the risk of SDS outbreaks, consider:

  • Planting soybean varieties with SDS- and SCN-resistance.
  • Treating your seeds with a seed treatment that performs well controlling SDS.
  • Planting fields with a history of SDS later because young, slower-growing plants are more susceptible to infection.
  • Taking measures to avoid or reduce soil compaction.

In the 2020 growing season, growers can look forward to another option to treat against SDS. Containing Adepidyn® fungicide, a powerful SDHI, a new seed treatment will deliver protection against SDS and nematodes, without causing additional early-season stress on the plant. Upon registration, it will be marketed as Saltro® seed treatment.

When comparing the same concentrations of Adepidyn and ILeVO® seed treatment, the diameter of the fungal mat shown in each petri dish demonstrates that Adepidyn exhibits higher intrinsic activity against the pathogen.


Syngenta trials. Vero Beach Research Station, FL 2017

Upon registration, Adepidyn is anticipated to provide:

  • Consistent yield improvement over leading SDS competitor under high SDS pressure.
  • High intrinsic activity against Fusarium virguliforme, the causal organism of SDS.
  • Activity against soybean cyst, root knot, lesion and lance nematodes.
  • A reduced risk of replants.
  • Protection against SDS without causing additional early-season plant stresses, including phytotoxicity, stunting, susceptibility to pests or weather, and reduced plant stands.

Adepidyn. Monticello, IL 2018

ILeVO. Monticello, IL 2018

Talk to your local Syngenta sales representative to learn more about your options for managing SDS.

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All photos are either the property of Syngenta or are used with permission.

Syngenta hereby disclaims liability for third-party websites.

Performance assessments are based upon results or analysis of public information, field observations and/or internal Syngenta evaluations.

Saltro is not currently registered for sale or use in the United States and is not being offered for sale.

©2019 Syngenta. Adepidyn and the Syngenta logo is a trademark of a Syngenta Group Company. All other trademarks are property of their respective owners.