From the scouting reports from the county educators and crop consultants – most of the soybeans in the state are very healthy with no disease symptoms.  However, as the news reports have indicated, there are a few varieties in a few locations that have higher incidence of frogeye leaf spot than we are accustomed to seeing at this growth stage – mid R2 – flowering in Ohio.  Most of the reports to date are along and south of route 70, which based on the past 12 years is where frogeye is the most common.  When this disease occurs this early in the season, where it can be readily observed, this

As farmers and consultants have been out checking their soybean stands, they are finding spots on the leaves.  The most common spotting on the unifoliates and first leaves is caused by Septoria glycines.  This is a fungus that overwinters on the previous soybean crop residue and in modern cultivars it is limited to the lower canopy.  We’ve done extensive studies on this disease over the past decade and I have yet to attribute an economic value in managing this.  We did this one experiment where put chlorothalonil on every week (not a legal application but for research purposes only