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Help Control Pythium Species in Cereals and Pulse Crops

February 23, 2023

Vayantis® fungicide seed treatment provides unmatched protection with a highly potent, effective mode of action against Pythium.

With more than 50 known species in the U.S. – and found in every agricultural soil in North America – Pythium is one of the most persistent, pervasive and resistant disease pathogens. In wheat, for example, it is so common that it is often misdiagnosed as winter injury, poor soil fertility or toxicity from crop residue.

Today’s growing trends are having an impact too. Many cereals and pulse crops growers in the Pacific Northwest are planting earlier into cool, wet soils, as well as reduced and no-till situations, which increases the risk of Pythium disease taking hold. Also, there are documented cases of resistance and/or insensitivity of Pythium across temperature environments to either metalaxyl and/or ethaboxam, found in nearly all fungicide seed treatments.

Because Pythium infections often strike crops prior to emergence, rotation growers who raise both cereals and pulse crops face significant, early-season challenges that can lead to post-harvest yield losses.

Yield Impact

Although its presence may be more visible in pulses, 14 species of Pythium have been found in wheat fields in eastern WA and northern ID, and the adverse impact on yields is clear:

  • In winter wheat, when Pythium populations were experimentally reduced or nearly eliminated, yield typically increased by 15-20%1 and sometimes up to 50%2.
  • Pythium has been described as more limiting to stands and seedling vigor of wheat during more years and over a greater portion of North America than any other disease3.

Developing an early-season seed treatment plan is critical for strong, healthy crops that maximize yield potential and quality. To control the relentless disease, adding Vayantis® fungicide seed treatment to a custom blend can help prevent Pythium infection during the most susceptible development period.

This approach gives you the power to address Pythium while also targeting other disease and insect challenges. It also provides the flexibility to create solutions specific to individual fields’ agronomic challenges and ensure crops get off to a strong start.

Vayantis Fungicide Seed Treatment

Vayantis provides unmatched protection with a highly potent, effective mode of action against Pythium, which improves the resilience of cereals and pulse crops to provide stands that deliver:

  • Better protection when facing difficult Pythium species, or high Pythium pressure.
  • More robust roots and better root development, even during challenging weather/environmental conditions.
  • Picarbutrazox – the active ingredient in Vayantis – is the most potent molecule against all Pythium
  • Activity on nearly 250 isolates, including the 40 isolates that demonstrate resistance or insensitivity to ethaboxam (1 of the active ingredients in products such as INTEGO® SUITE Cereals OF).
  • Increased average yields in moderate to high pressure situations, compared to other seed treatments.

Available in custom blends with 1/4 to 1/5 the use rate, Vayantis provides broader activity than many competitive seed treatments, and it enables more space on the seed and flexibility to add additional seed amendments without sacrificing best-in-class protection.

Cereals and pulse crops growers seeking to stop Pythium before it gets a chance to attack can confidently incorporate Vayantis fungicide seed treatment into their early-season management plans. With its new mode of action and powerful active ingredient, Vayantis protects cereals and pulse crops by delivering strong stands, better root health and increased yield potential.

side by side images between the effectiveness of different seed treatments

Vayantis provides greater protection against an MFX-R isolate of Pythium ultimum in wheat. Flats inoculated with Pythium ultimum and replicated 1 and 14 days after planting.

To learn more about Vayantis seed treatment, talk with your local Syngenta representative.

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

Product performance assumes disease presence. Performance assessments are based upon results or analysis of public information, field observations and/or internal Syngenta evaluations. Trials reflect treatment rates commonly recommended in the marketplace.

The trademarks or service marks displayed or otherwise used herein are the property of a Syngenta Group Company. All other trademarks are the property of their respective owners.

1Hans Kok, WSU/UI Extension Conservation Tillage Specialist, UI Ag Science 231, PO Box 442339, Moscow, ID 83844 USA Redesigned by Leila Styer, CAHE Computer Resource Unit; Maintained by Debbie Marsh, Dept. of Crop & Soil Sciences, WSU

2Degrees of Sensitivity to Metalaxyl Within the Pythium spp. Pathogenic to Wheat in the Pacific Northwest. R.J. COOK, Research Plant Pathologist, U.S. Department of Agriculture, Agricultural Research Service, Washington State University, Pullman 99164, and BING-XINGZHANG, Visiting Plant Pathologist to Washington State University from Zhejiang Agricultural University, Hangzhou, Zhejiang, Peoples Republic of China

3CA data, A. Dickson, and EU data, S. Torrian

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