In this issue:

Insect Pest Overview

Sweet Corn Insecticide Trial Results

New MDA Publications Available

Snap Bean Insecticide Trial Results

Weed Identification Resources

Resources Available for Weed Identification

Reprinted with permission, Michigan State University, Crop Advisory Team Alert, Rob Richardson, Horticulture, and Jim Kells, Crop and Soil Sciences August, 21, 2002

One of the most important aspects of weed control is the proper identification of weeds. Many resources are currently available for weed identification. Listed below are just a few of the tools that are available.

Books

Weeds of the Northeast - Richard H. Uva, Joseph C. Neal, and Joseph M. DiTomaso. Contains descriptions and color pictures of 299 weeds from Wisconsin to Maine and southern Canada to Virginia. Distinguishing features of weeds are highlighted with bold text and a dichotomous key for all 299 species is included. This book can be ordered from Cornell University Press (http://www.cornellpress.cornell.edu) for $29.95.

Weeds of Canada and the Northern United States - France Royer and Richard Dickinson. Contains descriptions, color pictures, and illustrations of 175 weed species. Available from the University of Alberta Press and also available for order online through amazon.com.

Weeds of Nebraska and the Great Plains - James Stubbendieck, Geir Y. Friisoe, and Margaret R. Bolick. Includes narratives of 396 weeds with line drawings and color pictures. Available for $25 from the Nebraska Department of Agriculture.

Weeds of the North Central States- Contains descriptions and black and white drawings of weeds of the North Central U.S. This book can be viewed online at: http://www.ag.uiuc.edu/~vista/html_pubs/WEEDS/list.html

SWSS Weed Identification Guide - Descriptions and color pictures of 363 of weeds of the U.S. and Canada. Available as a 7-volume paper set or as a CD-ROM. Can be ordered through the Southern Weed Science Society (http://www.thundersnow.com/pdfdocs/swssweedbro.pdf).

Weeds of the West - Tom Whitson et al. Contains descriptions and color pictures of 350 weeds of the western U.S. Order by mail through the University of Wyoming or order online for $35.00 at: http://www.amazon.com/exec/obidos/asin/0941570134/westernsocietyof/002-1684202-3309602

Ontario Weeds- Contains descriptions and illustrations of 315 weeds found in Ontario. Available for $15 from Publications Ontario (http://www.gov.on.ca:80/OMAFRA/english/products/pests.html).

Common Weed Seedlings of the North Central States - Andrew J. Chomas, James J. Kells, and J. Boyd Carey. North Central Regional Extension Publication No. 607. Contains descriptions and color pictures of numerous weed seedlings.

Internet resources

Virginia Tech Weed Identification Guide - http://www.ppws.vt.edu/weedindex.htm. Contains color pictures and descriptions of common weeds in Virginia. A dichotomous key to grasses is new to the site.

Common Weed Seedlings of Michigan - J. Boyd Carey, James J. Kells, and Karen A. Renner. http://www.msue.msu.edu/msue/iac/e1363/e1363.htm. Seedlings of common agronomic weeds are described with color pictures.

WSSA Weed Herbarium - http://www.wssa.net. Contains numerous color pictures of weeds from around the world.

Iowa State Weed Identification Resources - http://www.weeds.iastate.edu/weed-id/weedid.htm. Contains a weed seedling ID page and links to other weed identification resources.

Weed Identification by the Iowa Council on Food and Agricultural Research - http://web.aces.uiuc.edu/weedid/. Contains a weed identification key for 172 weed species.

New Jersey Agricultural Weed Gallery - http://www.rce.rutgers.edu/weeds/default.asp. Contains color pictures and descriptions of common New Jersey weeds.

University of California Weed Photo Gallery http://www.ipm.ucdavis.edu/PMG/weeds_common.html. Contains color pictures and descriptions of common California weeds.

Editor's Note

In addition to theses resources, Kevin Cavanaugh, Department of Agronomy, University fo Minnesota, can also provide weed identification services. See the May 24, 2002 article for more information.

Co-Editors: Bill Hutchison, Department of Entomology, University of Minnesota, hutch002@tc.umn.edu
Jeanne Ciborowski, IPM Program, Minnesota Department of Agriculture, jeanne.ciborowski@state.mn.us
Cindy Tong, Department of Horticulture, University of Minnesota, ctong@extension.umn.edu
Production Editor: Suzanne Wold, Research Assistant, University of Minnesota, woldx018@tc.umn.edu

Disclaimer
Reference to products in this publication is not intended to be an endorsement to the exclusion of others which may have similar uses. Any person using products listed in this publication assumes full responsibility for their use in accordance with current directions of the manufacturer

Last Revised October 11, 2002.
The University, including the Minnesota Extension Service, is an equal opportunity educator and employer.©2002 Minnesota Extension Service, University of Minnesota. All rights reserved. Contact copyright@extension.umn.edu for information on reproduction or use of this material.