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Performance of Pioneer® Brand Soybeans with ILeVO® Seed Treatment in SCN and SDS Environments

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Background and Objectives

  1. ILeVO® fungicide/nematicide seed treatment (active ingredient: fluopyram) provides protection of soybean seedlings from Fusarium virguliforme infection, the causal agent of sudden death syndrome (SDS). ILeVO fungicide/nematicide seed treatment also has activity against soybean cyst nematode (SCN).
  2. Pioneer researchers conducted trials in 2012 through 2015 evaluating ILeVO fungicide/nematicide seed treatment performance against SCN in soybeans.
  3. Research trials included ILeVO fungicide/nematicide seed treatment at two different rates – a lower rate intended for protection against SCN and a higher rate for protection against both SCN and SDS.

Study Description

Years: 2012, 2013, 2014, & 2015

Locations: 91

Plot Design: Replicated research trials

Seed Treatment:

  1. FST + IST (fungicide seed treatment/insecticide seed treatment)*
  2. FST + IST + ILeVO fungicide: SCN rate (0.60 fl oz/140k unit)
  3. FST + IST + ILeVO fungicide: SCN/SDS rate (1.18 fl oz/140k unit)

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

Site Characterization

  • SDS: A late-season (R3 or later) SDS assessment was made for each research location. Locations with soybeans exhibiting visual SDS symptomology were categorized as "SDS environments".
  • SCN: At planting, soil samples were taken from the non-protected check plots to determine the level of SCN infestation at each research location.
    • Locations sampled and having > 200 cyst eggs/100cc were categorized as having moderate SCN infestation (Mod-SCN)
    • Locations sampled and having < 200 cyst eggs/100cc were categorized as having low SCN infestations (Low-SCN).
  • SCN & SDS: Locations having both moderate SCN infestation and SDS symptomology were categorized as “Mod-SCN & SDS” environments.

Results

  • Across all locations and years, the FST + IST + ILeVO fungicide/nematicide treatments increased soybean grain yield over the FST + IST check by an average of 1.4 bu/acre when ILeVO fungicide / nematicide seed treatment was applied at the lower SCN rate, and 2.0 bu/acre when applied at the higher SDS/SCN rate (Figure 1).
  • In low- or moderate-SCN environments, both rates of ILeVO fungicide/nematicide seed treatment provided a similar yield advantage and win percentage over the base FST + IST (Figure 1 & Figure 2).
  • In locations having both moderate SCN infestations and SDS symptomology, the higher ILeVO fungicide/nematicide seed treatment rate recommended for protection against both SCN and SDS provided a 6.4 bu/acre (98% wins) advantage over the FST + IST check, whereas the lower ILeVO fungicide/nematicide seed treatment rate recommended for SCN only increased yield 3.3 bu/acre (82% wins) (Figure 1 & Figure 2).

 

Yield advantage with ILeVO fungicide/nematicide seed treatment compared to the base FST + IST in SCN and SDS environments.

Figure 1. Yield advantage with ILeVO fungicide/nematicide seed treatment compared to the base FST + IST in SCN and SDS environments.

 

ILeVO fungicide/nematicide seed treatment performance in SCN and SDS environments - percent wins over the base FST + IST.

Figure 2. ILeVO fungicide/nematicide seed treatment performance in SCN and SDS environments - percent wins over the base FST + IST.

Authors: Keith O'Bryan and Meredith Burnison

2012-2015 data are based on average of all comparisons made in 165 locations through Nov 1, 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

Components under the Pioneer Premium Seed Treatment offering for soybeans are applied at a 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 exclusive to Pioneer and its affiliates.

ILeVO® is a registered trademark of Bayer.

EverGol® is a registered trademark of Bayer.