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Diagnostic Guides
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Soybean Disases and Injury
Iowa State University Image Gallery
Soybean Diagnostic Guide
United Soybean Board
Soybean Diagnostic Guide
Michigan State University
Agronomy Guide for Soybean
Ontario Ministry of Food and Agriculture
Soybean Disease Atlas
North Carolina Extension
Soybean Growth and Development
A 28-page publication that explains soybean growth and development through the life cycle of a maturity group II variety. The publication ($4) can be ordered from the Iowa State University Extension Publication Center at (515) 294-5247.
Identifying Soybean Growth Stages. One-page, color illustrations (pdf file). Michigan State University.
Soybean Rust
Identifying Soybean Rust (pdf)
Good photos, including "look-alike" diseases
USDA, U.S. Land-grant universities, and the Ontario Ministry of Agriculture and Food
Soybean Rust (pdf)
Minnesota Department of Agriculture
Soybean Rust (pdf)
United Soybean Board
Seedling Diseases
Identification of soybean seedling diseases
Iowa State University
Weed Identification
Weed Identification
Iowa State University
Herbicide Injury
Herbicide Injury Diagnostic Key (with photos)
University of Wisconsin
Soybean Insects
Entomology Image Gallery
Iowa State University.
Extension Entomology
South Dakota State University
Soybean Insect Scouting Calendar - Purdue University
Information on these pages is from the cooperative effort of researchers throughout the North Central states. Information from this site can be copied and distributed for educational use. Please credit the source with our name and URL: NCSRP Plant Health Initiative at www.planthealth.info. Please do not use copyrighted photos without permission.