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.

Learn About Grow

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:

Prevention

Mechanical

Chemical

Cultural

Biological

Weed Management Toolbox

Recent IWM News

Bayer CropScience and USDA Collaborate To Promote On-The-Farm Integrated Weed Management

December 3, 2021 Grow IWM

USDA’s Agricultural Research Service-sponsored GROW network (www.growiwm.org) is pleased to collaborate with Bayer CropScience...

Uncategorized Grow News Industry News Harvest Weed Seed Control Integrated Weed Management Innovations Mechanical Weed Control News From Other Sources Cover Crops Harvest Weed Seed Management Prevention featured

A Practical Guide for Integrated Weed Management In Mid-Atlantic Grain Crops

December 3, 2021 Grow IWM

Integrated Weed Management (IWM) means integrating multiple weed control tactics to optimize weed control. The past several...

Tillage, weed control, and the weed seedbank.

October 4, 2021 Grow IWM

Tillage is used primarily to prepare the soil for planting. But tillage can have other impacts including destroying...

NCSU researchers use drones to identify Italian ryegrass seedlings in wheat

September 9, 2021 Grow IWM

Italian ryegrass is an herbicide-resistant weed infesting many winter wheat fields in the eastern US, including North Carolina. ...

How to Get Rid Of Weeds with multiple tactic layers

May 4, 2021 Grow IWM

Dr. Ramon Leon, North Carolina State University Extension and Research Weed Scientist, discusses how to manage winter and summer...

Uncategorized Grow News Industry News Harvest Weed Seed Control Integrated Weed Management Innovations Herbicide Resistant Weeds Mechanical Weed Control News From Other Sources Cover Crops Harvest Weed Seed Management Prevention featured

Mid-Atlantic Workshop on Herbicide-Resistance Went Virtual This Year

December 18, 2020 Grow IWM

A two-part workshop on herbicide-resistant weeds was held jointly with University of Maryland, Virginia Tech, and University of...

Turning the combine from a weed spreader into a weed predator

November 20, 2020 Grow IWM

Dr. Michael Flessner, Extension Weed Specialist at Virginia Tech, discusses his work with Shockley Farms in Northampton Co....

Killing weed seeds at harvest: a seed impact mill is now a reality in Virginia

October 16, 2020 Grow IWM

A Redekop Seed Control Unit was installed on a John Deere S680 combine at Shockley Farms, near Cape Charles, VA. Bill Shockley is...

Guidance for Building and Installing a Chaff Lining Prototype to a Combine

October 8, 2020 Grow IWM

Based on a JD9500 combine, researchers from the University of Delaware developed a chaff lining prototype. Building and...

On-farm Chaff Lining Field Results

October 1, 2020 Claudio Rubione

At harvest, you may discover that weeds have escaped your control efforts and are setting seeds. These escaped weeds can create...

Plan Your Cover Crops For Weed Suppression

September 17, 2020 Grow IWM

When it’s time to plan your cover crops for weed suppression, choosing the right planting timing as well as the right type of...

Consider Managing Escaped Weeds Prior to Harvest

August 27, 2020 Grow IWM

About to harvest? The soil seedbank serves as the source of next season’s weed problems. Weed seeds in the soil were deposited...

Bayer CropScience and USDA Collaborate To Promote On-The-Farm Integrated Weed Management

December 3, 2021 Grow IWM

USDA’s Agricultural Research Service-sponsored GROW network (www.growiwm.org) is pleased to collaborate with Bayer CropScience...

A Practical Guide for Integrated Weed Management In Mid-Atlantic Grain Crops

December 3, 2021 Grow IWM

Integrated Weed Management (IWM) means integrating multiple weed control tactics to optimize weed control. The past several...

Tillage, weed control, and the weed seedbank.

October 4, 2021 Grow IWM

Tillage is used primarily to prepare the soil for planting. But tillage can have other impacts including destroying...

NCSU researchers use drones to identify Italian ryegrass seedlings in wheat

September 9, 2021 Grow IWM

Italian ryegrass is an herbicide-resistant weed infesting many winter wheat fields in the eastern US, including North Carolina. ...

How to Get Rid Of Weeds with multiple tactic layers

May 4, 2021 Grow IWM

Dr. Ramon Leon, North Carolina State University Extension and Research Weed Scientist, discusses how to manage winter and summer...

Mid-Atlantic Workshop on Herbicide-Resistance Went Virtual This Year

December 18, 2020 Grow IWM

A two-part workshop on herbicide-resistant weeds was held jointly with University of Maryland, Virginia Tech, and University of...

Turning the combine from a weed spreader into a weed predator

November 20, 2020 Grow IWM

Dr. Michael Flessner, Extension Weed Specialist at Virginia Tech, discusses his work with Shockley Farms in Northampton Co....

Killing weed seeds at harvest: a seed impact mill is now a reality in Virginia

October 16, 2020 Grow IWM

A Redekop Seed Control Unit was installed on a John Deere S680 combine at Shockley Farms, near Cape Charles, VA. Bill Shockley is...

Guidance for Building and Installing a Chaff Lining Prototype to a Combine

October 8, 2020 Grow IWM

Based on a JD9500 combine, researchers from the University of Delaware developed a chaff lining prototype. Building and...

On-farm Chaff Lining Field Results

October 1, 2020 Claudio Rubione

At harvest, you may discover that weeds have escaped your control efforts and are setting seeds. These escaped weeds can create...

Plan Your Cover Crops For Weed Suppression

September 17, 2020 Grow IWM

When it’s time to plan your cover crops for weed suppression, choosing the right planting timing as well as the right type of...

Consider Managing Escaped Weeds Prior to Harvest

August 27, 2020 Grow IWM

About to harvest? The soil seedbank serves as the source of next season’s weed problems. Weed seeds in the soil were deposited...

Bayer CropScience and USDA Collaborate To Promote On-The-Farm Integrated Weed Management

December 3, 2021 Grow IWM

USDA’s Agricultural Research Service-sponsored GROW network (www.growiwm.org) is pleased to collaborate with Bayer CropScience...

A Practical Guide for Integrated Weed Management In Mid-Atlantic Grain Crops

December 3, 2021 Grow IWM

Integrated Weed Management (IWM) means integrating multiple weed control tactics to optimize weed control. The past several...

Tillage, weed control, and the weed seedbank.

October 4, 2021 Grow IWM

Tillage is used primarily to prepare the soil for planting. But tillage can have other impacts including destroying...

NCSU researchers use drones to identify Italian ryegrass seedlings in wheat

September 9, 2021 Grow IWM

Italian ryegrass is an herbicide-resistant weed infesting many winter wheat fields in the eastern US, including North Carolina. ...

How to Get Rid Of Weeds with multiple tactic layers

May 4, 2021 Grow IWM

Dr. Ramon Leon, North Carolina State University Extension and Research Weed Scientist, discusses how to manage winter and summer...

Mid-Atlantic Workshop on Herbicide-Resistance Went Virtual This Year

December 18, 2020 Grow IWM

A two-part workshop on herbicide-resistant weeds was held jointly with University of Maryland, Virginia Tech, and University of...

Turning the combine from a weed spreader into a weed predator

November 20, 2020 Grow IWM

Dr. Michael Flessner, Extension Weed Specialist at Virginia Tech, discusses his work with Shockley Farms in Northampton Co....

Killing weed seeds at harvest: a seed impact mill is now a reality in Virginia

October 16, 2020 Grow IWM

A Redekop Seed Control Unit was installed on a John Deere S680 combine at Shockley Farms, near Cape Charles, VA. Bill Shockley is...

Guidance for Building and Installing a Chaff Lining Prototype to a Combine

October 8, 2020 Grow IWM

Based on a JD9500 combine, researchers from the University of Delaware developed a chaff lining prototype. Building and...

On-farm Chaff Lining Field Results

October 1, 2020 Claudio Rubione

At harvest, you may discover that weeds have escaped your control efforts and are setting seeds. These escaped weeds can create...

Plan Your Cover Crops For Weed Suppression

September 17, 2020 Grow IWM

When it’s time to plan your cover crops for weed suppression, choosing the right planting timing as well as the right type of...

Consider Managing Escaped Weeds Prior to Harvest

August 27, 2020 Grow IWM

About to harvest? The soil seedbank serves as the source of next season’s weed problems. Weed seeds in the soil were deposited...

How to Get Rid Of Weeds with multiple tactic layers

May 4, 2021 Grow IWM

Dr. Ramon Leon, North Carolina State University Extension and Research Weed Scientist, discusses how to manage winter and summer...

Mid-Atlantic Workshop on Herbicide-Resistance Went Virtual This Year

December 18, 2020 Grow IWM

A two-part workshop on herbicide-resistant weeds was held jointly with University of Maryland, Virginia Tech, and University of...

Turning the combine from a weed spreader into a weed predator

November 20, 2020 Grow IWM

Dr. Michael Flessner, Extension Weed Specialist at Virginia Tech, discusses his work with Shockley Farms in Northampton Co....

GROW Members Learn How Australian Farmers Are Managing Weeds

March 23, 2020 Grow IWM

Dr. Steven Mirsky, Research Ecologist at the USDA-ARS, MD, explains what GROW members learned regarding harvest weed seed control...

Would You Like to Suppress Weeds with Cover Crops? See what happens by terminating them at different dates

November 21, 2018 Grow IWM

Cover crops can play a significant role in a multi-tactic approach to weed management. Dr. Norsworthy with the University of...

Robotics: A New IWM Tool In The Pipeline

November 2, 2018 Grow IWM

Scientists at the University of Illinois at Urbana-Champaign are working on research funded by the U.S. Department of Agriculture...

Harvest Time: Prevent Weed Seed Dispersal, A SIMPLE PLAN

October 9, 2018 Grow IWM

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...

How to Interpret Herbicide Mode of Action?

October 8, 2018 Grow IWM

Combating herbicide resistance requires combining herbicide modes of action. Re-posted from the Texas Row Crops Newsletter, July...

Cover crop strategy for Weed Suppression=HIGH BIOMASS

September 7, 2018 Grow IWM

Now is the time to think about planning your cover crops if you would like to “add” a different weed management...

Cleaning Weed Seeds from a Combine – Video

December 5, 2017 Grow IWM

Annie Klodd and Jeff Metz, Pennsylvania State University Equipment that enters a field with mature herbicide-resistant weeds will...

Raising weeds for science – researchers study when weeds shed their seeds

September 19, 2017 Grow IWM

Last week, we wrote an article on Harvest Weed Seed Control using the Harrington Seed Destructor (HSD). This effective machine...

Herbicide rotation ineffective against resistance in waterhemp

September 6, 2017 Grow IWM

Lauren Quinn, University of Illinois URBANA, Ill. – Farmers have been battling herbicide-resistant weeds for generations. A...

Bayer CropScience and USDA Collaborate To Promote On-The-Farm Integrated Weed Management

December 3, 2021 Grow IWM

USDA’s Agricultural Research Service-sponsored GROW network (www.growiwm.org) is pleased to collaborate with Bayer CropScience...

A Practical Guide for Integrated Weed Management In Mid-Atlantic Grain Crops

December 3, 2021 Grow IWM

Integrated Weed Management (IWM) means integrating multiple weed control tactics to optimize weed control. The past several...

Tillage, weed control, and the weed seedbank.

October 4, 2021 Grow IWM

Tillage is used primarily to prepare the soil for planting. But tillage can have other impacts including destroying...

NCSU researchers use drones to identify Italian ryegrass seedlings in wheat

September 9, 2021 Grow IWM

Italian ryegrass is an herbicide-resistant weed infesting many winter wheat fields in the eastern US, including North Carolina. ...

How to Get Rid Of Weeds with multiple tactic layers

May 4, 2021 Grow IWM

Dr. Ramon Leon, North Carolina State University Extension and Research Weed Scientist, discusses how to manage winter and summer...

Mid-Atlantic Workshop on Herbicide-Resistance Went Virtual This Year

December 18, 2020 Grow IWM

A two-part workshop on herbicide-resistant weeds was held jointly with University of Maryland, Virginia Tech, and University of...

Turning the combine from a weed spreader into a weed predator

November 20, 2020 Grow IWM

Dr. Michael Flessner, Extension Weed Specialist at Virginia Tech, discusses his work with Shockley Farms in Northampton Co....

Killing weed seeds at harvest: a seed impact mill is now a reality in Virginia

October 16, 2020 Grow IWM

A Redekop Seed Control Unit was installed on a John Deere S680 combine at Shockley Farms, near Cape Charles, VA. Bill Shockley is...

Guidance for Building and Installing a Chaff Lining Prototype to a Combine

October 8, 2020 Grow IWM

Based on a JD9500 combine, researchers from the University of Delaware developed a chaff lining prototype. Building and...

On-farm Chaff Lining Field Results

October 1, 2020 Claudio Rubione

At harvest, you may discover that weeds have escaped your control efforts and are setting seeds. These escaped weeds can create...

Plan Your Cover Crops For Weed Suppression

September 17, 2020 Grow IWM

When it’s time to plan your cover crops for weed suppression, choosing the right planting timing as well as the right type of...

Consider Managing Escaped Weeds Prior to Harvest

August 27, 2020 Grow IWM

About to harvest? The soil seedbank serves as the source of next season’s weed problems. Weed seeds in the soil were deposited...

In the Fields

What Are Your Problem Weeds?

Learn More

Waterhemp

Learn More

Giant Ragweed

Learn More

Italian Ryegrass

Learn More

Barnyardgrass

Learn More

Johnsongrass

Learn More

Redroot Pigweed

Learn More

Smooth Pigweed

Learn More

Common Ragweed

Learn More

Common Lambsquarters

Learn More

Horseweed (marestail)

Learn More

Kochia

Learn More

Palmer Amaranth

View Full List of Weeds

Getting Rid Of WeedsThrough Integrated Weed Management

No Seeds. No Weeds.

What is Integrated Weed Management?

Recent IWM News

In the Fields

What Are Your Problem Weeds?

Getting Rid Of Weeds
Through Integrated Weed Management