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Seed Treatment
Treating soybean seed with a fungicide or fungicide plus insecticide generally does not increase yield when high quality seed is planted under North Dakota conditions. Seed treatment benefits seedlots that are damaged by disease, frost, excessive seed coat breakage and age. In most cases, seed lots that do not meet certification standards should not be planted.
Seed companies may routinely treat soybean seed with fungicides prior to bagging. Farmers planning to treat seed themselves should always follow fungicide/insecticide label directions as to rate and methods of treatment. Certain fungicides may injure or kill N-fixing rhizobia bacteria which are used for seed inoculation. Check NDSU Extension Circular PP-622 at http://www.ext.nodak.edu/extpubs/plantsci/pests/pp622w.htm for recommendations on current registered seed treatments. Treated soybean seed can only be used for planting purposes.
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