Diseases
Crop diseases like Tar Spot, Goss’s Wilt, Sudden Death Syndrome or Frogeye leaf spot can have a big impact. Learn more about specific crop diseases in Iowa and different management practices to minimize their impact on crop yields.
Timely Insights on Diseases
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January 15, 2025Content Author
In 2024, the effect of commercial fungicides on foliar diseases of corn were evaluated at six Iowa State University Research and Demonstrations Farms: the Northwest Research and Demonstration Farm (NWRF, Sutherland), Northern Research and Demonstration Farm (NRF, Kanawha), Northeast Research and Demonstration Farm (NERF, Nashua), Central Iowa Research and Demonstration Farms, (AEA, Boone), Armstrong Memorial Research and Demonstration Farm (AMRF, Lewis)
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January 9, 2025Content Author
In 2024, commercial foliar fungicides were evaluated across seven Iowa State University research and demonstration farms to determine their effect on disease control and yield response on soybeans.
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November 7, 2024Content Author
After harvest is completed and equipment is cleaned and winterized, there’s an activity that can be done in upcoming weeks that could pay large dividends relating to future soybean yields. That task is collecting soil samples to assess the situation with the soybean cyst nematode (SCN) in fields.
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October 24, 2024Content Author
Iowa State University recently updated its list of soybean varieties with resistance to the soybean cyst nematode (SCN) for Iowa. The list includes 200 varieties with the less common Peking SCN resistance. These varieties can be especially effective in managing SCN producing and higher yields in fields where SCN has developed high levels of reproduction on varieties with PI 88788 resistance.
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October 24, 2024Authors
Growing resistant soybean varieties is critical to achieving and maintaining profitable soybean yields in fields infested with the soybean cyst nematode (SCN). Information about SCN-resistant soybean varieties in maturity groups 0-3 available for use in Iowa is compiled annually in ISU Extension publication CROP1649. The newly updated publication lists 920 SCN-resistant soybean varieties from 33 brands offered by 25 companies. This article contains information about the varieties, their genetic sources of resistance, and several other important attributes of the varieties.
