Extension and Outreach Information
The agronomic weed science extension program at Penn State focuses on issues relating to herbicide use, weed biology and ecology, integrated pest management (IPM), cover crop use, and other issues pertaining to the management of weeds in corn, soybeans, forages, and small grains.
In the News
- What’s New for Agronomic Weed Control in 2011
- Field Crop News (newsletter)
- Pesticide Education Newsletters
Powerpoint Presentations (presented as PDFs)
- Weed I.D. and Management — featuring 10 common weeds
- Weed Management in Organic Crops — Research Results Update
Penn State Extension Publications
Other Penn State Guides/Publications
- The Mid-Atlantic Berry Guide
- Tree Fruit Production Guide
- Landscape and Ornamental Publications
- Commercial Vegetable Production Recommendations
- Controlling Weeds in Nursery and Landscape Plantings
- Weed Management in Turfgrass
- Roadside vegetation management
Weed Identification
- Penn State Weed Factsheets - 32 species (pdf format)
- Common weed seedlings of Michigan - Michigan State University
- Common Weeds of No-till Cropping Systems - Purdue University
- Giant Hogweed Identification - Penn State
- Idaho Noxious Weeds
- Identification of the weedy pigweeds and waterhemps - Iowa State University
- Kansas Noxious Weeds - Kansas Dept. of Ag
- New Jersey Weed Gallery - Rutgers University
- Weed Photos - Weed Science Society of America
- Print resources for Weed ID - Iowa State University
- Virginia Tech Weed ID
- Weed Seedling Identification - Iowa State University
Directory For Invasive Weeds of the Northeast
- Government Sites
- World, National ,and Canadian Web Sites
- State and Regional Sites
- University Sites
- Private, Commercial and Non Profit Sites
- On-line Books and Newsletters
- Mail Order Books on Invasive and Noxious Weeds
- On-line Fact Sheets
- Fact Sheets for Problem Invasive Weeds
Herbicide Information
- Conducting a bioassay for herbicide residues - Cornell University
- How Herbicides Work - University of Illinois
- Herbicide Symptomology - University of Georgia
- Herbicide Injury Symptoms - Purdue University
- Herbicide Mode of Action - Kansas State University (2001)
- Herbicide Injury Key - Penn State (download pdf file - 434KB)
Pesticide Manufactures and Labels
- Amvac
- Bayer Crop Science
- BASF - Crop Protection
- Dow AgroSciences
- DuPont Agricultural Products
- FMC
- Gowan
- Growmark
- Helena
- MeisterPr0 - Labels/MSDS
- Monsanto
- PBI/Gordon
- Sipcam Agro USA
- Syngenta
- UAP - United Agri Products
- Valent
- Winfield Solutions
- CDMS labels and MSDS
- C & P Press (“Greenbook”)
Herbicide Resistant Weed Information
- International Survey of Herbicide Resistant Weeds - Ian Heap’s site
- Herbicide Resistance Action Committee - International focus
- Herbicide Resistant Weeds - NCR 468 (Jeff Gunsolus)
- Western Australia Herbicide Resistance Initiative (WAHRI)
- Color-Enhanced Herbicide Site of Action Bulletin (Univ. Illinois)
- Biology and Management of Horseweed - NC Regional Pub 223
Other Penn State Pest Management Sites
- Penn State Crop and Soil Sciences Weed Ecology Lab
- Penn State Department of Entomology
- Penn State Department of Plant Pathology
- Penn State’s Office of Pesticide Education
- The Pennsylvania IPM Program
- The Center for Plasticulture
- The Penn State and PennDot Roadside Research Project
Links to Weed Science Programs
- ISU Weed Science Online - Iowa State University
- 2006 Turfgrass Research Report - Iowa State University
- Applied Weed Science Research - University of Minnesota
- Broadleaf Weed Control for Home Lawns - Ohio State University Extension
- Canadian Poisonous Plant Information System
- Florida Weed Management Guide
- Michigan State Weed Science
- Mississippi State Extension Weed Resources
- Missouri - University of at Columbia
- New Mexico State University - Weed Science Program
- Ohio State Extension Information - Ohioline
- Purdue University Weed Science
- Southern Illinois University - Weed Control Progress Reports
- Indiana Plants Poisonous to Livestock and Pets - Purdue Extension
- University of Maryland - Weed Science
- University of Illinois IPM Program
- University of Delaware IPM Program
- Virginia Tech Weed Science
- Weed Publications - University of Nebraska Extension
- Weeds and control publications - North Dakota State University
- University of Wisconsin Weed Science
Professional Societies and Associations
- American Crop Protection Association
- Colorado Weed Management Association
- European Weed Research Society
- International Weed Science Society
- Weed Science Society of America
- Weed Science Society of Victoria
- North Central Weed Science Society
- Northeastern Weed Science Society
- Southern Weed Science Society
- Western Society of Weed Science
- Herbicide Resistance Action Committee
- International Survey of Herbicide Resistant Weeds
Government Pages
- Commonwealth of Pennsylvania
- Pennsylvania Department of Agriculture
- Cooperative State Research Education & Extension Service
- National Agricultural Library
- National Agricultural Statistic Service (NASS)
- US EPA - Environmental Protection Agency
- USDA - US Dept. of Agriculture
- USDA Sustainable Ag Systems Lab - Beltsville, MD
- ARS Southern Weed Science Laboratory
Organic Weed Management Sources
- Attra publications
- Cornell University Organic Weed Management Resource
- HDRA Organic Weed Management - UK site
- Organic weed management - UC Davis
- The Rodale Institute
- The New Farm Magazine - Rodale
- Vinegar and clove oil study results - 2005 WSSA Abstract
- Weed management for Organic Farmers - Iowa State
