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Nematode

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For many of us, there’s a lot of “hurry up and wait” time during harvest. Time spent waiting in a grain cart or truck on the edges of fields while the combine fills may feel like wasted time and lead to frustration.

Why not make the most of that time by using it to collect soil samples for soybean cyst nematode (and other) analyses?

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If the forecast holds true, it looks like it is going to be another year of excessive soil moisture and possible flooding come this spring.

The increased level of soil moisture has implications with regards to plant stand establishment as well as root rot and nematode infestations.

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Resistant varieties continue to be a key tool for managing the soybean cyst nematode (SCN). With financial support from the soybean checkoff through the Iowa Soybean Association, Iowa State University annually compiles a list of SCN-resistant soybean varieties that are available for use in Iowa.

Research in Minnesota looking at soybean cyst nematode’s response to liquid swine manure showed hog manure decreased juvenile nematode levels.

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The appearance of SCN females on soybean roots just 26 days after planting is as early as I have seen. — Greg Tylka, Iowa State University

To fight potato-cyst nematode, many growers use a calculator for forecasting population dynamics and potato yields. The calculator is now being updated to keep pace with recent advancements in the understanding of potato-cyst nematode biology, shifting varietal trends, and new management practices.

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The number of acres planted to cover crops annually has been steadily increasing in recent years throughout the United States. Meanwhile, the soybean cyst nematode (SCN) continues to sit atop the U.S. list of yield-suppressing pathogens.

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Now more than ever, farmers need to know if their fields are infested with SCN and what the numbers are. The higher the number of SCN eggs in the soil, the greater the yield loss — even with resistant soybean varieties.

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As you’re harvesting soybeans this fall and notice an unexplained drop on your yield monitor, one culprit to consider is the soybean cyst nematode – a tiny yield-robbing roundworm that lives in the soil.

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