Control Winter Annual Weed Hosts of Soybean Cyst Nematode
Source: Ohio State University
Some of the most common winter annuals in Ohio serve as alternate hosts of soybean cyst nematode (SCN) and can result in increased SCN egg numbers in soil if the weeds are not eliminated soon after they germinate in the fall, according to Kent Harrison and Anne Dorrance, Ohio State University.
The most prevalent winter annual weed of Ohio and Indiana no-tillage crop fields is purple deadnettle, which unfortunately is also one of the strongest known hosts of SCN.
OSU research conducted over a five-year period indicated that SCN egg populations in soil increased three- to five fold in no-tillage soybean plots containing purple deadnettle compared to weed-free soybean plots.
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