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soybean cyst nematode SCN
Cysts of the soybean cyst nematode (SCN) seen as small, round, white structures on soybean roots dug in the field.

Soybean Cyst Nematode Females Already on Soybean Roots


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. 

Read more from Iowa State University about finding SCN on roots already this season.


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