ISSUE 14   August 26, 2010


Weeds of the Midwestern United States & Central Canada

Edited by Charles T. Bryson and Michael S. DeFelice
Publication date: July 1, 2010
Flexibind w/ flaps, $44.95 | ISBN 978-0-8203-3506-3
440 pp.; 1423 color photos | 363 maps

This weed ID book features more than 1,400 full-color photographs, 363 maps on 440 pages and this handy guide provides essential information on more than 350 of the most troublesome weedy and invasive plants found in the midwestern United States and central Canada. Drawing on the expertise of more than forty weed scientists and botanists, the guide identifies each plant at various stages of its life and offers useful details about its origin, habitat, morphology, biology, distribution, and toxic properties. The book also includes illustrations of the most common characteristics of plants and terms used to describe them, a key to plant families included in the book, a glossary of frequently used terms, a bibliography, and indexes of scientific and common plant names. This is an essential guide for agronomists, crop and soil scientists, horticulturists, botanists, Cooperative Extension Service agents, farmers, gardeners, students in agriculture and biology, lawn care professionals, green industry professionals, nursery owners, government quarantine workers, and land preservationists.

Each species account includess:

Covers Illinois, Indiana, Iowa, northeastern Kansas, northern Kentucky, southern Manitoba, Michigan, Minnesota, northern Missouri, eastern Nebraska, North  Dakota, Ohio, southern Ontario, southwestern Quebec, southeastern Saskatchewan, eastern South Dakota and Wisconsin. 

Rich Zollinger
Extension Weed Specialist


Scout crop fields for weeds before harvest to determine the effectiveness of this year’s herbicide program. If weeds are present determine why they are present. There are many reasons for weeds to be present at this time of the year in crop fields. If weeds are present due to herbicide resistance, it is important to know sooner than later. The presence of 6 to 12 plants surviving herbicides in a field will make future weed management more difficult.

A video is available to assist in scouting for glyphosate-resistant weeds. The video can be found by visiting the following internet address and clicking on “Scouting for Glyphosate Resistance”: This video is helpful in scouting for low-level resistance to any herbicide. Seventy-five percent of fields predicted to have glyphosate-resistant common ragweed based upon individual plant response demonstrated in the video were confirmed to have resistant ragweed.

The most accurate way to confirm herbicide resistance is to collect seeds from suspected plants and conduct greenhouse research comparing the suspected population to known resistant and susceptible populations. If you suspect glyphosate-resistant weeds in Roundup Ready sugarbeet, soybean, or corn, contact Jeff Stachler at or by phone at 701-231-8131 (office) or 218-790-8131 (cell).

Pulling/cutting surviving plants, removing them from the field, and destroying them should reduce the spread of resistant plants. If glyphosate-resistant weeds are suspected prepare a diverse weed management plan for next season to reduce the spread of glyphosate-resistant weeds.


Remove all bolting beets from Roundup Ready sugarbeet fields as soon as possible. Allowing these beets to produce seed can cause a future weed problem in future Roundup Ready crops.

Consider harvesting all or parts of the weediest sugarbeet fields during this pre-pile period. Destruction of weeds during the topping process at this time of the year should reduce weed seed production compared to waiting until the piling period of harvest.

Jeff Stachler
Agronomist - Weed Science

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