Protecting and Enhancing Soybean Yield

Protecting and Enhancing Soybean Yield
Dan Klavetter, Agronomy Sales, Stewartville (507) 272-0157

Soybeans are in the heart of bloom as I write this in the middle of July. We have been finding instances of Rust and Northern Corn Leaf Blight in corn, which indicates that we will be seeing disease pressure in soybeans as well. The response we have seen in applying soybean fungicide has been quite consistent, around 80 to 90%. The average yield increase is around the 5 bushel mark.


A couple of common diseases to watch out for are Septoria Brown Spot  and Anthracnose. Brown Spot is a leaf fungus that starts in the lower canopy and can travel upward, affecting photosynthesis in the plant. Anthracnose is a stem disease that usually isn’t visible until late in the growing season. Premature plant death and poor seed quality are effects of anthracnose. Both of these diseases, along with many others, are brought on by warm and wet conditions. 


No-till and narrow-row fields are generally more susceptible to disease. The amount of “trash” in no-till fields harbors disease and narrow-row fields have less airflow through the canopy which allows for favorable disease growth as well. Any soybean field is open for insect feeding though, which allows for points of infection for disease. So if you have to spray for bugs in your beans, consider consulting with your All American Co-op Progressive Ag Center agronomist to add some fungicide to your insecticide pass.


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