Wisconsin Corn Promotion Board

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WSMB Offering Free Soybean Cyst Sampling
Wisconsin Ag Connection - 03/26/2013

The University of Wisconsin-Extension and the Wisconsin Soybean Marketing Board are teaming up once again this year to hold free soybean cyst nematode testing this fall. The effort is designed to help producers stay ahead of the most important nematode pest of soybean crops.

Eggs of SCN persist in the soil between soybean crops so a sample can be submitted any time that is convenient. The soil test report indicates the number of eggs in the sample and is useful for selecting the right variety for the next soybean crop. Retests of fields planted with SCN-resistant varieties over multiple years shows how the nematode population is responding to variety resistance and provides an early warning should the nematode population adapt to host genetics.

Last year, the WSMB expanded the nematode testing program to include other pest nematodes in addition to SCN. These nematodes are less damaging to soybean than SCN but can cause enough yield loss to warrant treatment. As is the case for SCN, there are no rescue treatments for nematodes so the primary purpose of this year's soil test is to plan for next year's crop. Soil samples collected in corn for nematode analysis have predictive value for explaining yield if they are collected before the corn V6 growth stage. Sampling early in the season will provide information about the risk potential for the current corn crop and the next soybean crop.

For more information on soybean cyst nematode and management practices to help reduce the losses from this pest, call 608-262-7975.

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