Soybean Disease Loss Calculator

Calculate yield and economic losses due to diseases in soybeans

Search Criteria

Query multiple types of production and estimated yield loss data by timeframe, disease, and geographic area* 

  1. Select desired start year and end year. For a single year of data choose the same year for both start and end. 
  2. Select a disease category, which will autofill the diseases. 
  3. Select one or multiple diseases.
  4. Further define geographic area by country, region, or select one or multiple states.
  5. Click on Search and results will display. 
  6. Further details are available by clicking on Production and Losses within results. 
  7. If specific diseases or states are not selected, the output will include values for all diseases and states present in the selection boxes. 

*Not all data categories are available for all locations and all years, and disease categories changed slightly as data collection progressed. Disease loss data was traditionally presented seperately for the Northern U.S and Southern U.S., categories which differ from the states within regional IPM center groupings.

  • These data are expert estimates only. 
  • Data is currently available from 1996 onwards. 
  • Because data was obtained from differing sources (extension personnel, previously published papers, and government reporting agencies) discrepancies among years and locations exist that cannot be accounted for. Thus, it is important to remember that the data presented here are estimates only. 
  • Most soybean data were back calculated from reported yield reductions to percent losses using production reports from USDA NASS and OMAFRA.
  • Soybean loss data not available for Florida in 2002 and 2003; Minnesota in 1999 and 2000; New York from 1996-2016; Ontario in 1996, 1997, 2003-2005, and 2007-2009; Pennsylvania in 2001; and Texas in 2011. Results do not include this data. 
  • Cercospora leaf blight and purple seed stain losses have been combined into one value. 
  • From 1996-2010, losses from root knot nematode and other nematodes (excluding soybean cyst nematode) were contained in a single category; from 2011 onward, root knot nematode data were separated from the other nematodes category; from 2014 onward, Reniform nematode data were separated from the other nematodes category. 
  • Canadian data from 1998 may be representative of all of Canada rather than just Ontario. 
  • Data from Iowa in 2005 was missing. However, since Iowa production is such a high percentage of soybeans grown in the U.S., not reporting disease loss data from Iowa in 2005 would heavily skew queried results. To account for this, disease-related extension articles from 2005 and data from other sources were used to estimate percent losses for this year.

How to cite information from this resource: 

Crop Protection Network. 2020. Estimates of corn, soybean, and wheat yield losses due to disease: an online tool. Https://

For more information about disease loss data, please see the About page.