Plant Health Initiative

Diagnostic and Field Guides

Scouting White Mold in Soybean - Iowa State University and Iowa Soybean Association

Early Season Scouting - Iowa State University

Mid-season Soybean Scouting - Iowa State University and Iowa Soybean Association

Late-season Soybean Scouting - Iowa State University and Iowa Soybean Association

Soybean and Pest Management Field Guide 2nd Edition - Iowa State University

North Dakota Soybean Production Guide - North Dakota State University

Illinois Crop Production Handbook - Managing Diseases

Kansas Soybean Production Handbook

Minnesota Soybean Field Book

Soybean Production in Missouri

Soybean Diseases. CSI 0004. Iowa State University Extension online publications.

Soybean Disease and Pest Management Field Guide
Available free of charge from Iowa State University Extension online publications

Corn & Soybean Field Guide: 2012 Edition
Available from Purdue University Education Store - sold out. Orders being taken for 2013 edition.

Corn, Soybean, Wheat, and Alfalfa Field Guide
Ohio State University Bulletin 827 — available as a pdf file

 

Soybean Aphids

Soybean Aphid Management field guide
Available free of charge from Iowa State University Extension online publications.

A Visual Guide to the Number of Soybean Aphids per Leaflet. Photos of soybean leaflets with a specific number of aphids displayed will help you make accurate counts when scouting this pest. Available from the University of Wisconsin Nutrient and Pest Management program at or view pdf online.

 

Soybean Cyst Nematode

SCN Management Guide 5th Edition

Soybean Cyst Nematode Management Field Guide 2nd edition, Iowa State University

 

Online Diagnostic Guides

Soybean Disases and Injury Image Gallery and Entomology (Insect) Image Gallery
Iowa State University

Soybean Diagnostic Guide
United Soybean Board

Soybean Insect Scouting Calendar - Purdue University

Soybean Growth and Development

A 28-page publication that explains soybean growth and development through the life cycle of a maturity group II variety.  Available from the Iowa State University Extension Publication Center at .

Identifying Soybean Growth Stages. One-page pdf document with color illustrations. Michigan State University.

Weed Identification

Weeds of the North Central States

Weed Identification website
Iowa State University

Weed Identification Guide (pdf) - Iowa State University

Weed Identification and Weed Photos
University of Illinois

IPM Quick Guide: Troublesome Weeds of Wisconsin.
Provides key characteristics of seven different weeds and how to avoid confusion with weeds of similar appearance. Weeds included are: giant ragweed, Eastern black nightshade, waterhemp, wirestem muhly, woolly cupgrass, yellow foxtail, and large crabgrass. View online or order a copy from the University of Wisconsin Nutrient and Pest Management Program at .

NCR 607 Common Weed Seedlings of the North Central States 
(4.4 MB pdf file). This guide is designed to help identify seedling weeds while there is still time to control them. This guide includes 54 of the most common weed species in the North Central region. Colored photographs are provided that highlight the distinguishing characteristics of the weed seedlings. Available online, or for purchase from the University of Wisconsin Learning Store.

Weed Identification Guide- Iowa State University

Early Spring Weeds of No-till Crop Production
(3MB pdf file). Includes a key for identification and color photos. University of Illinois

Minnesota Weed Seedling Photo Collection

Weed Emergence Poster (1 MB pdf)
depicts the emergence sequence of 16 important weeds

University of Missouri Weed Identification Guide
Online photo gallery in which you can search for weeds by their scientific name or common name.

Online Weed Identification Tool
This online weed ID tool from the University of Wisconsin is organized to ask questions about the unknown plant and based on the user’s input, the program will produce a list of plants (scientific and common names) along with thumbnail images that match the information entered.