Crop Sequence - White Mold Management Practices

Rotating soybeans and corn or small grains resulted in reduced white mold incidence in a three-year long on-farm study planted at three locations in Wisconsin.

This reduction in white mold incidence is more than the effect of parasitism and senescence on sclerotia viability since sclerotia can persist for years in the soil. An additional benefit results when rotational crops stimulate sclerotia germination and deplete soilborne sclerotia. Crops that develop a dense canopy; such as small grains, probably stimulate germination by enough sclerotia to reduce disease incidence when soybeans are planted. Although the reduction in disease incidence was smaill, approximately 10 percent when compared to SSR incidence after a susceptible variety, rotation in combination with variety selection, wider row spacing, or lower plant population would help to reduce white mold incidence and its effect on yield.

 

> Variety Selection

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URL: http://www.soybeans.umn.edu/crop/diseases/whitemold/wm_mgmnt_sequence.htm

Last Modified 9/6/05 by:
Sarah Jameson-Jones
Web Designer/Developer
james039@umn.edu

 

In this Section

White Mold Main Page

Life Cycle

  1. Apothecia Formation
  2. Ascospore Dispersal
  3. Sclerotia Development
  4. Soilborne Sclerotia & Seedborne Inoculum

Management Practices

  1. Fertilizer & Lime Application
  2. Tillage
  3. Crop Sequence
  4. Variety Selection
  5. Seed Treatment
  6. Plant Population
  7. Row Width
  8. Herbicide Application
  9. Fungicide Application
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Figure 1: Apothecia Observed in Three Crops During the 1996 Growing Season

Small Figure 1

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Figure 2: Effect of Previous Crop or Variety on Yield and White Mold Incidence

Small Figure 2

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