A research tool for calculating estimated historical yield loss in corn, soybean, and wheat from diseases and invertebrate pests
The purpose this calculator is to share economically important information on estimated crop losses from diseases or invertebrate pests (insects, slugs, etc.) with those engaged in research, education, and policy formation. This online calculator can query multiple types of production and yield loss data for a variety of user-defined or predetermined factors including geographic area and timeframe. It is important to note the limitations of this tool including the fact that loss values here are expert estimates and not actual loss values. Also, not all data categories are available for all locations and all years, and categories changed slightly over the years.
Crop Protection Network. 2022. Estimates of corn, soybean, and wheat yield losses due to diseases and invertebrate pests: an online tool. Doi.org/10.31274/cpn-20191121-0
The Corn Disease Working Group (CDWG), the North Central Research and Extension Activity (NCERA) 137 Soybean Disease Committee, the Southern Soybean Disease Workers, the North Central Regional Committee on Management of Small Grain Diseases (NCERA 184), the Western Wheat Workers (WERA 97), and others revise disease or invertebrate loss estimates annually. Methods for estimating losses vary by state or province and year. Estimates may be based on statewide surveys; feedback from university Extension, industry, government, and farmer representatives; and personal experiences.
Loss values are based on production before estimated losses for each state or province:
Bushels or USD harvested / ([100 - total percent estimated loss] ÷ 100)
Then, total bushels or USD lost per disease or invertebrate pest for each state or province are formulated:
(percent loss ÷ 100) x yield before estimated losses
Average loss values in USD per acre are determined by dividing economic losses by acres planted.
Not all data categories are available for all locations and all years, and categories changed slightly over the years.
This information is only a guide. The values in this resoure are not intended to be exact values of yield losses due to diseases or invertebrate pests, and some data are missing for certain years and locations. Contributors and data managers assume no liability resulting from the use of these estimates.
References to products in this resource are not intended to be an endorsement to the exclusion of others that may be similar. Individuals using such products assume responsibility for their use in accordance with current directions of the manufacturer.
The Crop Protection Network (CPN) is a multi-state and international collaboration of university and provincial extension specialists, and public and private professionals who provide unbiased, research-based information to farmers and agricultural personnel. Our goal is to communicate relevant information that will help professionals identify and manage field crop diseases.
Annual disease loss summaries for selected years can be found here.
Additional data on the economic costs associated with invertebrate management, such as field scouting and insecticide application, can be found in the Midsouth Entomologist online publication.
Find more crop protection resources at the Crop Protection Network.
Daren Mueller and Adam Sisson
Tom Allen, Carl Bradley, Daren Mueller, Andrew Friskop, Adam Sisson, Fred Musser, Steve Koenning, and Allen Wrather
Tom Allen, Kelsey Andersen-Onofre, Meriem Aoun, Gary Bergstrom, Kaitlyn Bissonnette, Jason Bond, Kira Bowen, Bruce Bosley, Carl Bradley, Kirk Broders, Mary Burrows, Emmanuel Byamukama, Angus Catchot, Jr., Martin Chilvers, Cliff Coker, Alyssa Collins, Shawn Conley, Christina Cowger, John Damicone, Jeff Davis, Erick DeWolf, Chris DiFonzo, Ruth Dill-Macky, Anne Dorrance, Nicholas Dufault, Paul Esker, Travis Faske, Nicole Fiorellino, Andrew Friskop, Loren Giesler, Scott Graham, Jeremy Greene, Arvydas Grybauskas, Austin Hagan, Chelsea Harbach, Glen Hartman, Ron Heiniger, Ames Herbert, Donald Hershman, Clayton Hollier, David Hooker, Bob Hunger, Tom Isakeit, Tamra Jackson-Ziems, Douglas Jardine, Bryan Jensen, Heather Kelly, Robert Kemerait, David Kerns, Kasia Kinzer, Nathan Kleczewski, Robert Koch, Alyssa Koehler, Steve Koenning, Robert Kratochvil, James Kurle, David Langston, Gus Lorenz, Dean Malvick, Sam Markell, James Marois, Juliet Marshall, Alfredo Martinez, Febina Mathew, Uta McKelvey, Marcia McMullen, Hillary Mehl, Kelsey Mehl, Ron Meyer, Michelle Mostrom, Daren Mueller, John Mueller, Robert Mulrooney, Fred Musser, Berlin Nelson, Melvin Newman, Ken Obasa, Rodrigo Onofre, Larry Osborne, Charles Overstreet, David Owens, Guy Padgett, Pierce Paul, Angie Peltier, Patrick Phipps, Michael Plumblee, Paul Price, Tim Reed, Dominic Reisig, Phillip Roberts, Alison Robertson, Gregory Roth, Tom Royer, Nicholas Seiter, Edward Sikora, Adam Sisson, Ian Small, Damon Smith, Terry Spurlock, Scott Stewart, Connie Tande, Sally Taylor, Darcy Telenko, Albert Tenuta, Lindsey Thiessen, Benjamin Thrash, Kelly Tilmon, Raul Villanueva, Paul Vincelli, Fred Warner, M. O. Way, Stephen Wegulo, Bill Wiebold, Jochum Wiersma, Kiersten Wise, and Allen Wrather.
Contributors to this publication include members of the Corn Disease Working Group, North Central Research and Extension Activity 137 Soybean Disease Committee, the Southern Soybean Disease Workers, the North Central Regional Committee on Management of Small Grain Diseases (NCERA 184), and others from land grant universities. These university and extension scientists represent many institutions, including: University of Arkansas, Auburn University, Clemson University, Colorado State University, Cornell University, University of Delaware, University of Florida, University of Georgia, University of Guelph, University of Idaho, University of Illinois, Iowa State University, Kansas State University, University of Kentucky, Louisiana State University, Michigan State University, University of Minnesota, Mississippi State University, University of Missouri, Montana State University, University of Nebraska, North Carolina State University, North Dakota State University, The Ohio State University, Oklahoma State University, Ontario Ministry of Agriculture, Food and Rural Affairs, Pennsylvania State University, Purdue University, South Dakota State University, University of Tennessee, Texas A&M University, Virginia Tech, University of Wisconsin-Madison, and University of Wyoming.
Yield and USD production values obtained from:
United States Department of Agriculture - National Agriculture Statistics Service (USDA-NASS). Quick Stats 2.0. Https://www.nass.usda.gov/Quick_Stats/index.php.
Statistics Canada: Field Crop Reporting Series.Ontario Ministry of Agric., Food, and Rural Affairs, Guelph. Http://www.omafra.gov.on.ca/english/stats/crops/index.html
Personal inquiries with crop specialists when data was unavailable via USDA-NASS
Additional Canadian data from:
Wrather, J. A., Anderson, T. R., Arsyad, D. M., Tan, Y., Ploper, L. D., Porta-Puglia, A., Ram, H. H., and Yorinori, J. T. 2001. Soybean disease loss estimates for the top ten soybean-producing countries in 1998. Can. J. Plant Pathol. 23: 115-121.
Wrather, J. A., Koenning, S. R., and Anderson, T. R. 2003. Effect of diseases on soybean yields in the United States and Ontario (1999-2002). Online. Plant Health Progress doi:10.1094/PHP-2003-0325-01-RV.
In addition to support from USDA-NIFA, this project was funded in part through Growing Forward 2 (GF2), a federal-provincial territorial initiative. The Agricultural Adaptation Council assists in the delivery of GF2 in Ontario.
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