Management of Early Season Stressors in Soybean Production

​Trial Objective

  • To optimize yield potential, soybean growers often plant as early as possible within the recommended planting window. Such early planting predisposes seeds and young seedlings to early-season stressors, such as insects, diseases, and cool, wet soils, which can significantly affect stand establishment and overall plant and field health.
  • To help alleviate some of the early planting challenges, the use of seed treatments has become an important tool in fields prone to early-season stressors. Insecticides, fungicides, and nematicides are the common components of most seed treatments, and the choice depends on the anticipated pest to be controlled.
  • The objective of this study was to determine soybean product performance as influenced by two seed treatment options.

Research Site Details

  • Twenty-seven soybean products ranging from 1.8 to 3.7 maturity group (MG) were planted at an average of 140,000 seeds/acre.
  • Each product received two types of seed treatments:
    • Base seed treatment (fungicide and insecticide)
    • Base + ILeVO® seed treatment
    • ILeVO® is a systemic soybean seed treatment for protection against early-season damage caused by pathogenic nematodes and Fusarium virguliforme, which causes Sudden Death Syndrome (SDS).
  • The trial was planted in 30-inch row spacing, two rows per product per treatment, 200-ft long plots, and three replications.
  • There was a low level of SDS incidence at the research site.
  • No symptoms of soybean cyst nematode (SCN) were observed at the research site. 2017 soil samples showed low SCN levels.
  • Weed management consisted of a rye burndown with Roundup PowerMAX® herbicide and a post-emergence application of XtendiMax® herbicide with VaporGrip® Technology, Warrant® Herbicide, and Roundup PowerMAX® herbicide.

Understanding the Results

  • In general, ILeVO® seed treatment did not substantially affect grain moisture content and stem lodging but did have a remarkable effect on plant density in some products (Table 1).
  • Of the 27 products tested, eight (approx. 30%) did not have a positive yield response to ILeVO® seed treatment. Of the remaining 70% that responded positively, the yield advantage ranged between 0.5 to 10.8 bu/acre (Figure 1).
  • The average yield response to ILeVO® seed treatment for all products was 2.53 bu/acre; however, when looking only at the products that showed a positive yield response with ILeVO® seed treatment, the average yield response was 4.8 bu/acre (Figure 1).
  • In general, products with an SDS score of 3 had the lowest yield response to ILeVO® seed treatment (Figure 2).

What Does This Mean for Your Farm?

  • In general, ILeVO® seed treatment did not substantially affect grain moisture content and stem lodging but did have a remarkable effect on plant density in some products (Table 1).
  • Of the 27 products tested, eight (approx. 30%) did not have a positive yield response to ILeVO® seed treatment. Of the remaining 70% that responded positively, the yield advantage ranged between 0.5 to 10.8 bu/acre (Figure 1).
  • The average yield response to ILeVO® seed treatment for all products was 2.53 bu/acre; however, when looking only at the products that showed a positive yield response with ILeVO® seed treatment, the average yield response was 4.8 bu/acre (Figure 1).
  • In general, products with an SDS score of 3 had the lowest yield response to ILeVO® seed treatment (Figure 2).

 

ID 181106133109

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