Getting Rid Of Weeds
Through Integrated Weed Management
We are a publicly led network coordinating research and outreach, providing science-based information and decision support tools to make agriculture more sustainable and precise. We work to develop integrated weed management solutions that are practical and adoptable.
No Seeds. No Weeds.
For over 50 years, herbicides have been a highly effective method to control weeds and protect crop yields. Herbicides have supported the wide-spread use of no-till and limited cultivation for weed control, improving soil health. However, over reliance on a few key herbicides has caused the development of particularly problematic herbicide-resistant weeds.
For some farmers, herbicides alone just aren’t getting the job done anymore.
Integrated Weed Management (IWM) is the answer.
What is Integrated Weed Management?
Integrated weed management (IWM) combines various methods to reduce or eliminate the effect of weeds on crop production over time, using a combination of practices that are most effective for solving specific weed issues. Techniques include:
Recent IWM News
Turning the combine from a weed spreader into a weed predator
Dr. Michael Flessner, Extension Weed Specialist at Virginia Tech, discusses his work with Shockley Farms in Northampton Co....
featured
Grow News
Harvest Weed Seed Control
Herbicide Resistant Weeds
Killing weed seeds at harvest: a seed impact mill is now a reality in Virginia
A Redekop Seed Control Unit was installed on a John Deere S680 combine at Shockley Farms, near Cape Charles, VA. Bill Shockley is...
featured
Harvest Weed Seed Control
Mechanical Weed Control
Guidance for Building and Installing a Chaff Lining Prototype to a Combine
Based on a JD9500 combine, researchers from the University of Delaware developed a chaff lining prototype. Building and...
featured
Grow News
Harvest Weed Seed Control
On-farm Chaff Lining Field Results
At harvest, you may discover that weeds have escaped your control efforts and are setting seeds. These escaped weeds can create...
featured
Harvest Weed Seed Control
Plan Your Cover Crops For Weed Suppression
When it’s time to plan your cover crops for weed suppression, choosing the right planting timing as well as the right type of...
Cover Crops
featured
Grow News
Consider Managing Escaped Weeds Prior to Harvest
About to harvest? The soil seedbank serves as the source of next season’s weed problems. Weed seeds in the soil were deposited...
Grow News
Harvest Weed Seed Control
Muthu Bagavathiannan, Texas A&M Weed Scientist, shares what he learned from Australian farmers
In a recent visit to Western Australia, GROW Team members learned first hand from Australian growers, how are they successfully...
Grow News
Harvest Weed Seed Control
Managing Italian ryegrass in wheat with integrated weed management
At this point in the season, small grain farmers have won or lost the battle with Italian ryegrass. But all may not be lost....
featured
Grow News
Harvest Weed Seed Control
Row Spacing As A Weed Management Tool
Crop competition is key to good weed control, and a thick dense crop canopy will serve to suppress weeds for most of the growing...
featured
Grow News
Using “Planting Green” to Help Manage Weeds
Planting green allows the cover crops to grow for an additional few weeks and allows them to produce more biomass. The...
Cover Crops
featured
Grow News
Eric Westra, Colorado State Weed Specialist, Evaluates Weed Management Potential at Harvest
Dr. Eric Westra, Colorado State Weed Specialist, evaluates which Harvest Weed Seed Control tools could potentially be adopted by...
Grow News
Harvest Weed Seed Control
Uncategorized
Integrating Tactics For Johnsongrass Management in Grain Sorghum
Johnsongrass is a major problem in summer annual crops, especially in grain sorghum due to the lack of selective herbicide...
featured
Grow News
Harvest Weed Seed Control
Plan Your Cover Crops For Weed Suppression
When it’s time to plan your cover crops for weed suppression, choosing the right planting timing as well as the right type of...
Cover Crops
featured
Grow News
Using “Planting Green” to Help Manage Weeds
Planting green allows the cover crops to grow for an additional few weeks and allows them to produce more biomass. The...
Cover Crops
featured
Grow News
What is the Best Way to Terminate a Cover Crop?
Cover crop termination should be considered in advance when choosing a cover crop. Select a cover crop based on your cropping...
Cover Crops
featured
Grow News
GROW Members Learn How Australian Farmers Are Managing Weeds
Dr. Steven Mirsky, Research Ecologist at the USDA-ARS, MD, explains what GROW members learned regarding harvest weed seed control...
Cover Crops
Grow News
Harvest Weed Seed Control
Harvest Weed Seed Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Cotton Weed Management With a Cereal Rye Cover Crops
Weed management in cotton has become more challenging due to an increase in herbicide-resistant weeds, such as horseweed and...
Cover Crops
Grow News
Cover crops: Country-Wide Conclusions
Several coordinated field trials are being conducted across the US to examine the benefit of cover crops for weed management. No...
Cover Crops
Grow News
Cover Crops for Weed Suppression. Are They an Option for Texas Growers?
Texas A&M weed specialists are working hard to help farmers in Southeast Texas manage herbicide-resistant weeds using cover...
Cover Crops
Grow News
Would You Like to Suppress Weeds with Cover Crops? See what happens by terminating them at different dates
Cover crops can play a significant role in a multi-tactic approach to weed management. Dr. Norsworthy with the University of...
Cover Crops
Grow News
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Cover crop strategy for Weed Suppression=HIGH BIOMASS
Now is the time to think about planning your cover crops if you would like to “add” a different weed management...
Cover Crops
Grow News
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Turning the combine from a weed spreader into a weed predator
Dr. Michael Flessner, Extension Weed Specialist at Virginia Tech, discusses his work with Shockley Farms in Northampton Co....
featured
Grow News
Harvest Weed Seed Control
Herbicide Resistant Weeds
Guidance for Building and Installing a Chaff Lining Prototype to a Combine
Based on a JD9500 combine, researchers from the University of Delaware developed a chaff lining prototype. Building and...
featured
Grow News
Harvest Weed Seed Control
Plan Your Cover Crops For Weed Suppression
When it’s time to plan your cover crops for weed suppression, choosing the right planting timing as well as the right type of...
Cover Crops
featured
Grow News
Consider Managing Escaped Weeds Prior to Harvest
About to harvest? The soil seedbank serves as the source of next season’s weed problems. Weed seeds in the soil were deposited...
Grow News
Harvest Weed Seed Control
Muthu Bagavathiannan, Texas A&M Weed Scientist, shares what he learned from Australian farmers
In a recent visit to Western Australia, GROW Team members learned first hand from Australian growers, how are they successfully...
Grow News
Harvest Weed Seed Control
Managing Italian ryegrass in wheat with integrated weed management
At this point in the season, small grain farmers have won or lost the battle with Italian ryegrass. But all may not be lost....
featured
Grow News
Harvest Weed Seed Control
Row Spacing As A Weed Management Tool
Crop competition is key to good weed control, and a thick dense crop canopy will serve to suppress weeds for most of the growing...
featured
Grow News
Using “Planting Green” to Help Manage Weeds
Planting green allows the cover crops to grow for an additional few weeks and allows them to produce more biomass. The...
Cover Crops
featured
Grow News
Eric Westra, Colorado State Weed Specialist, Evaluates Weed Management Potential at Harvest
Dr. Eric Westra, Colorado State Weed Specialist, evaluates which Harvest Weed Seed Control tools could potentially be adopted by...
Grow News
Harvest Weed Seed Control
Uncategorized
Integrating Tactics For Johnsongrass Management in Grain Sorghum
Johnsongrass is a major problem in summer annual crops, especially in grain sorghum due to the lack of selective herbicide...
featured
Grow News
Harvest Weed Seed Control
Effective Site of Action and How it Should Be Used
When it comes to choosing the right herbicide, it might be useful and important to refresh how to use different and multiple...
featured
Grow News
What is the Best Way to Terminate a Cover Crop?
Cover crop termination should be considered in advance when choosing a cover crop. Select a cover crop based on your cropping...
Cover Crops
featured
Grow News
Turning the combine from a weed spreader into a weed predator
Dr. Michael Flessner, Extension Weed Specialist at Virginia Tech, discusses his work with Shockley Farms in Northampton Co....
featured
Grow News
Harvest Weed Seed Control
Herbicide Resistant Weeds
GROW Members Learn How Australian Farmers Are Managing Weeds
Dr. Steven Mirsky, Research Ecologist at the USDA-ARS, MD, explains what GROW members learned regarding harvest weed seed control...
Cover Crops
Grow News
Harvest Weed Seed Control
Harvest Weed Seed Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Would You Like to Suppress Weeds with Cover Crops? See what happens by terminating them at different dates
Cover crops can play a significant role in a multi-tactic approach to weed management. Dr. Norsworthy with the University of...
Cover Crops
Grow News
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Robotics: A New IWM Tool In The Pipeline
Scientists at the University of Illinois at Urbana-Champaign are working on research funded by the U.S. Department of Agriculture...
Grow News
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Harvest Time: Prevent Weed Seed Dispersal, A SIMPLE PLAN
Farmers are very busy during harvest time. Yet this is the final time to do something about the weeds in the field. If weeds and...
Grow News
Harvest Weed Seed Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
How to Interpret Herbicide Mode of Action?
Combating herbicide resistance requires combining herbicide modes of action. Re-posted from the Texas Row Crops Newsletter, July...
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Cover crop strategy for Weed Suppression=HIGH BIOMASS
Now is the time to think about planning your cover crops if you would like to “add” a different weed management...
Cover Crops
Grow News
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Cleaning Weed Seeds from a Combine – Video
Annie Klodd and Jeff Metz, Pennsylvania State University Equipment that enters a field with mature herbicide-resistant weeds will...
Grow News
Harvest Weed Seed Control
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Raising weeds for science – researchers study when weeds shed their seeds
Last week, we wrote an article on Harvest Weed Seed Control using the Harrington Seed Destructor (HSD). This effective machine...
Harvest Weed Seed Control
Herbicide Resistant Weeds
Herbicide rotation ineffective against resistance in waterhemp
Lauren Quinn, University of Illinois URBANA, Ill. – Farmers have been battling herbicide-resistant weeds for generations. A...
Herbicide Resistant Weeds
Weed of the Week: Giant Foxtail
Giant foxtail is a common summer annual grass in row crops and forages. It emerges for a long period in the spring. It typically...
Herbicide Resistant Weeds
Soybean Burndown – If you Haven’t Sprayed Yet, Good Luck
Some weeds, like horseweed/marestail, can be very hard to control in POST if they’re not controlled prior to planting. If...
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Turning the combine from a weed spreader into a weed predator
Dr. Michael Flessner, Extension Weed Specialist at Virginia Tech, discusses his work with Shockley Farms in Northampton Co....
featured
Grow News
Harvest Weed Seed Control
Herbicide Resistant Weeds
Killing weed seeds at harvest: a seed impact mill is now a reality in Virginia
A Redekop Seed Control Unit was installed on a John Deere S680 combine at Shockley Farms, near Cape Charles, VA. Bill Shockley is...
featured
Harvest Weed Seed Control
Mechanical Weed Control
Guidance for Building and Installing a Chaff Lining Prototype to a Combine
Based on a JD9500 combine, researchers from the University of Delaware developed a chaff lining prototype. Building and...
featured
Grow News
Harvest Weed Seed Control
On-farm Chaff Lining Field Results
At harvest, you may discover that weeds have escaped your control efforts and are setting seeds. These escaped weeds can create...
featured
Harvest Weed Seed Control
Consider Managing Escaped Weeds Prior to Harvest
About to harvest? The soil seedbank serves as the source of next season’s weed problems. Weed seeds in the soil were deposited...
Grow News
Harvest Weed Seed Control
Muthu Bagavathiannan, Texas A&M Weed Scientist, shares what he learned from Australian farmers
In a recent visit to Western Australia, GROW Team members learned first hand from Australian growers, how are they successfully...
Grow News
Harvest Weed Seed Control
Managing Italian ryegrass in wheat with integrated weed management
At this point in the season, small grain farmers have won or lost the battle with Italian ryegrass. But all may not be lost....
featured
Grow News
Harvest Weed Seed Control
Eric Westra, Colorado State Weed Specialist, Evaluates Weed Management Potential at Harvest
Dr. Eric Westra, Colorado State Weed Specialist, evaluates which Harvest Weed Seed Control tools could potentially be adopted by...
Grow News
Harvest Weed Seed Control
Uncategorized
Integrating Tactics For Johnsongrass Management in Grain Sorghum
Johnsongrass is a major problem in summer annual crops, especially in grain sorghum due to the lack of selective herbicide...
featured
Grow News
Harvest Weed Seed Control
Lauren Lazaro, LSU AgCenter, sees the potential of Harvest Weed Seed Control in Louisiana
Dr. Lauren Lazaro, LSU AgCenter’s Weed Specialist, visited Australian farmers and learned how they are dealing with...
Grow News
Harvest Weed Seed Control
GROW Members Learn How Australian Farmers Are Managing Weeds
Dr. Steven Mirsky, Research Ecologist at the USDA-ARS, MD, explains what GROW members learned regarding harvest weed seed control...
Cover Crops
Grow News
Harvest Weed Seed Control
Harvest Weed Seed Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
A NEW Harvest Weed Seed Control Tool from Tecfarm
In December 2019, members of GROW visited Western Australia to learn first-hand about harvest weed seed control. Machinery...
Harvest Weed Seed Control
News From Other Sources
In the Fields
What Are Your Problem Weeds?
Giant Ragweed
Italian Ryegrass
Barnyardgrass
Johnsongrass
Redroot Pigweed
Smooth Pigweed
Common Ragweed
Common Lambsquarters
Horseweed (marestail)
Kochia
Palmer Amaranth
Waterhemp
