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Performance of Soybean Seed Treatments Against SDS and SCN in On-Farm Trials

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Objectives

  1. In 2015, Pioneer researchers conducted on-farm trials evaluating the performance of soybean seed treatments across a broad range of environments including locations with sudden death syndrome (SDS), soybean cyst nematode (SCN), or early-season stress.
  2. ILeVO® fungicide/nematicide seed treatment (active ingredient: fluopyram) provides protection of soybean seedlings from Fusarium virguliforme infection, the causal agent of sudden death syndrome. ILeVO fungicide seed treatment also has activity against SCN.

Study Description

Year: 2015

Locations: 193 on-farm trials

Plot Design: Two replications per treatment at each on-farm location.

Seed Treatment:

  1. FST + IST: Standard fungicide seed treatment (FST) + insecticide seed treatment (IST)*
  2. FST + IST + ILeVO fungicide: FST + IST + ILeVO FST/NST (1.18 fl oz/140k unit)

*FST = EverGol® Energy fungicide + Allegiance® fungicide; IST = Gaucho® insecticide

Trial location near Utica, NE showing differences in SDS symptoms among seed treatments on an SDS-susceptible (left) and resistant (right) soybean variety.

Trial location near Utica, NE showing differences in SDS symptoms among seed treatments on an SDS-susceptible (left) and resistant (right) soybean variety. August 2015.

Site Characterization

  • On-farm research locations were characterized and results analyzed according to SDS and SCN pressure.
  • SCN pressure groupings:
    • High = SCN > 450 eggs/100 cc of soil
    • Low = SCN < 450 eggs/100 cc of soil

Results

  • Soybeans treated with FST + IST + ILeVO fungicide produced significantly higher grain yield than FST + IST (4.9 bu/acre) in high SCN environments compared to 1.8 bu/acre in low SCN environments.
  • In moderate SDS environments the addition of ILeVO fungicide increased grain yield 4.5 bu/acre over the FST + IST check.
Yield Performance of FST + IST + ILeVO Fungicide Seed Treatment Relative to FST + IST Check.

Means within a group designated with the same letter do not significantly differ at α = 0.10

Authors: Keith O'Bryan and Meredith Burnison

2015 data are based on average of all comparisons made in 193 locations through October 2015. Do not use these or any other data from a limited number of trials as a significant factor in product selection.

The foregoing is provided for informational use only. Please contact your Pioneer sales professional for information and suggestions specific to your operation. Product performance is variable and depends on many factors such as moisture and heat stress, soil type, management practices and environmental stress as well as disease and pest pressures. Individual results may vary.

PIONEER® brand products are provided subject to the terms and conditions of purchase which are part of the labeling and purchase documents.

Pioneer Premium Seed Treatment for soybeans is applied at Pioneer production facility or by an independent sales representative of Pioneer. Not all sales representatives offer treatment services, and costs and other charges may vary. See your Pioneer sales representative for details. Seed treatment offering is exclusive to Pioneer and its affiliates.

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