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

Harrington Seed Destructor managing director visited US farmers to help adapt harvest weed seed control technology.

June 14, 2022 Grow IWM

Judson Wheatley, managing director for de Bruin Engineering, made the long trip from Australia to the US in mid-May to visit...

Grow News Harvest Weed Seed Control featured

Influence of Integrated Weed Management Practices on When Soybean Canopy Develops

May 27, 2022 Grow IWM

Diverse and integrated weed management (IWM) strategies based on the practices of crop rotation, competitive crop cultivars,...

featured Grow News

Identifying summer annual grasses in grain crops

May 25, 2022 Grow IWM

Name that grassy weed: GROW team member Dr. Mark VanGessel provides an overview of summer annual grass weed identification....

Herbicide Resistant Weeds

Herbicide-resistant and susceptible waterhemp

Why care about metabolic herbicide resistance?

May 9, 2022 Grow IWM

Target site resistance has been the more common form of resistance, while metabolic resistance has been “flying under the...

featured Herbicide Resistance Grow News

How to quantify the benefits of cover crops with Steven Mirsky

April 15, 2022 Grow IWM

In a recent episode of the Strip-Till Farmer podcast, associate editor Sarah Hill talked with Steven Mirsky about adopting cover...

featured Grow 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...

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

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...

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

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...

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

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. ...

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

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...

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

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...

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

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....

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

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...

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

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...

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

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...

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

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...

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

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...

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

Harrington Seed Destructor managing director visited US farmers to help adapt harvest weed seed control technology.

June 14, 2022 Grow IWM

Judson Wheatley, managing director for de Bruin Engineering, made the long trip from Australia to the US in mid-May to visit...

Grow News Harvest Weed Seed Control featured

Influence of Integrated Weed Management Practices on When Soybean Canopy Develops

May 27, 2022 Grow IWM

Diverse and integrated weed management (IWM) strategies based on the practices of crop rotation, competitive crop cultivars,...

featured Grow News

Why care about metabolic herbicide resistance?

May 9, 2022 Grow IWM

Target site resistance has been the more common form of resistance, while metabolic resistance has been “flying under the...

featured Herbicide Resistance Grow News

How to quantify the benefits of cover crops with Steven Mirsky

April 15, 2022 Grow IWM

In a recent episode of the Strip-Till Farmer podcast, associate editor Sarah Hill talked with Steven Mirsky about adopting cover...

featured Grow 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...

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...

Identifying summer annual grasses in grain crops

May 25, 2022 Grow IWM

Name that grassy weed: GROW team member Dr. Mark VanGessel provides an overview of summer annual grass weed identification....

Herbicide Resistant Weeds

Why care about metabolic herbicide resistance?

May 9, 2022 Grow IWM

Target site resistance has been the more common form of resistance, while metabolic resistance has been “flying under the...

featured Herbicide Resistance Grow News

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...

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

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...

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

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

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...

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

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...

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

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...

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

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