What sort of crop rotation is recommended if I do find SCN in my fields?

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Here at ISU, we have two management recommendation for SCN-infested fields. The recommendation given is based on the SCN egg population density (egg count) of the sample submitted.

Recommendation #1 - for fields with egg densities up to 5,000 eggs per 100 cc soil

We recommend that growers follow a six-year crop rotation scheme as illustrated below:

  • 1st year - Nonhost crop (such as corn)
    2nd year - 'PI88788' Resistant soybean
    3rd year - Nonhost crop
    4th year - 'Peking' Resistant soybean
    5th year - Nonhost crop
    6th year - Susceptible soybean

Recommendation #2 - for fields with egg densities greater than 5,000 eggs per 100 cc soil

  • We advise that farmers grow several years of a nonhost crop, such as corn, and to sample after harvest in the fall. When the SCN egg population densities drop below 5,000 per 100 cc soil, we then feel comfortable recommending that the grower follow the six year rotation listed above. 

Crop rotation

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