The soybean cyst nematode (SCN) is one of the most damaging pests of soybeans in Iowa and the Midwest. SCN can cause foliar symptoms of soybean sudden death syndrome (SDS) to occur earlier in the season and to become more severe, leading to increased yield losses from the disease.
The appearance of SCN females on the roots of soybean plants usually occurs five or six weeks after planting in Iowa and represents completion of the first of multiple generations of the nematode in a growing season.
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On Sunday, June 2, Tom Hillyer of Hillyer AgriServices in West Liberty, Iowa, observed emerging SCN females on roots of susceptible soybeans that were planted on May 8. These soybeans were only in the V2 stage of development when the SCN females were observed.
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