Getting Rid Of Weeds
Through Integrated Weed Management

We are a scientist-led network coordinating research to help farmers across the U.S. fight herbicide-resistance with a greater diversity of weed control strategies to complement chemical use.

GROW aims to provide information on tools such as cover crops, increased crop competition, harvest weed seed control, and more.

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.

Prevention Cultural Chemical Biological Mechanical IWM

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

Farmer Forum Recap: Combine Set-Up for Threshing Green Material

  December 6, 2022   Grow IWM
In the final Farmer Forum of the 2022 season on November 29, Australian presenters shared their combine threshing secrets for...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management      featured   

Texas Scientists Use Drone Spot Sprayers to Fight Weeds

  November 29, 2022   Grow IWM
If you’re looking for the future of precision herbicide use, check out the cotton fields of southeastern Texas, near College...
  featured      Herbicide Resistance      Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Last Call for Weed Seed Prevention: Equipment Cleanout

  November 21, 2022   Grow IWM
The 2022 harvest season is winding down, but your farm equipment might be holding onto something you’d rather leave behind:...
  Harvest Weed Seed Management      Prevention      featured      Grow News      Herbicide Resistant Weeds      Mechanical Weed Control   

A Better View of Cover Crops Could Help Weed Control

  November 16, 2022   Grow IWM
Imagine a farmer flying a drone over a rye cover crop field. An app on his smartphone quickly generates a map of the field...
  featured      Grow News      Integrated Weed Management Innovations      Cover Crops      Prevention   

The Fate of Weed Seeds: Where Do They Go in a Combine?

  November 10, 2022   Grow IWM
Weed seeds vanish from our view when they enter a combine at harvest, but Virginia Tech researchers want to unmask the mystery of...
  Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Farmer Forum Recap: How to Optimize Threshing Settings for Harvest Weed Seed Control

  October 28, 2022   Grow IWM
In GROW’s fourth Farmer Forum of the season, Australian combine experts took a deep dive into combine settings for threshing...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management      featured   

Does Harvest Weed Seed Control Work in Rice Fields?

  October 26, 2022   Grow IWM
Texas researchers want to know how harvest weed seed control tactics such as the integrated Harrington Seed Destructor (iHSD)...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management      featured      Grow News   

Missouri Scientists Explore Weed Electrocution in Soybeans

  October 24, 2022   Grow IWM
Imagine taking a direct hit of 15,000 volts of electricity, as you stood in a wide open field, feet planted in the soil. ...
  News From Other Sources      featured      Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Weed Electrocution   

Texas Rice Farmer Tries Out iHSD to Halt Weed Seedbank

  October 13, 2022   Grow IWM
GROW headed to Texas recently to interview Bryan Wiese, owner of Wiese Brothers Farm in Wharton, about his unique decision to try...
  featured      Grow News      Harvest Weed Seed Control   

Farmer Forum Recap: How to Set Up Combine Headers for Weed Seed Capture

  October 11, 2022   Claudio Rubione
In GROW’s third Farmer Forum of the season, Australian combine experts presented on how to set up a combine header to capture...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management   

Meet Ray Harrington, Founder of the Harrington Seed Destructor

  October 7, 2022   Grow IWM
The Harrington Seed Destructor (HSD) is now an internationally known tool, but it all started more than two decades ago, as the...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      featured   

EPA Visits MD Farms to Talk Weeds & Pesticide Labels

  October 3, 2022   Grow IWM
ROCKVILLE, Md. — A group of more than 40 EPA scientists hit the road on September 13, 2022, for a farm tour of southern...
  Herbicide Resistance      Grow News      Industry News      Herbicide Resistant Weeds      Cover Crops      featured   

A Better View of Cover Crops Could Help Weed Control

  November 16, 2022   Grow IWM
Imagine a farmer flying a drone over a rye cover crop field. An app on his smartphone quickly generates a map of the field...
  featured      Grow News      Integrated Weed Management Innovations      Cover Crops      Prevention   

EPA Visits MD Farms to Talk Weeds & Pesticide Labels

  October 3, 2022   Grow IWM
ROCKVILLE, Md. — A group of more than 40 EPA scientists hit the road on September 13, 2022, for a farm tour of southern...
  Herbicide Resistance      Grow News      Industry News      Herbicide Resistant Weeds      Cover Crops      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...
  Integrated Weed Management Innovations      Mechanical Weed Control      News From Other Sources      Cover Crops      Harvest Weed Seed Management      Uncategorized      Grow News      Prevention      Industry News      Harvest Weed Seed Control      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...
  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      Cover Crops   

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

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

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

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

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

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...
  Mechanical Weed Control      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   

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

Farmer Forum Recap: Combine Set-Up for Threshing Green Material

  December 6, 2022   Grow IWM
In the final Farmer Forum of the 2022 season on November 29, Australian presenters shared their combine threshing secrets for...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management      featured   

Texas Scientists Use Drone Spot Sprayers to Fight Weeds

  November 29, 2022   Grow IWM
If you’re looking for the future of precision herbicide use, check out the cotton fields of southeastern Texas, near College...
  featured      Herbicide Resistance      Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Last Call for Weed Seed Prevention: Equipment Cleanout

  November 21, 2022   Grow IWM
The 2022 harvest season is winding down, but your farm equipment might be holding onto something you’d rather leave behind:...
  Harvest Weed Seed Management      Prevention      featured      Grow News      Herbicide Resistant Weeds      Mechanical Weed Control   

A Better View of Cover Crops Could Help Weed Control

  November 16, 2022   Grow IWM
Imagine a farmer flying a drone over a rye cover crop field. An app on his smartphone quickly generates a map of the field...
  featured      Grow News      Integrated Weed Management Innovations      Cover Crops      Prevention   

The Fate of Weed Seeds: Where Do They Go in a Combine?

  November 10, 2022   Grow IWM
Weed seeds vanish from our view when they enter a combine at harvest, but Virginia Tech researchers want to unmask the mystery of...
  Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Farmer Forum Recap: How to Optimize Threshing Settings for Harvest Weed Seed Control

  October 28, 2022   Grow IWM
In GROW’s fourth Farmer Forum of the season, Australian combine experts took a deep dive into combine settings for threshing...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management      featured   

Does Harvest Weed Seed Control Work in Rice Fields?

  October 26, 2022   Grow IWM
Texas researchers want to know how harvest weed seed control tactics such as the integrated Harrington Seed Destructor (iHSD)...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management      featured      Grow News   

Texas Rice Farmer Tries Out iHSD to Halt Weed Seedbank

  October 13, 2022   Grow IWM
GROW headed to Texas recently to interview Bryan Wiese, owner of Wiese Brothers Farm in Wharton, about his unique decision to try...
  featured      Grow News      Harvest Weed Seed Control   

Farmer Forum Recap: How to Set Up Combine Headers for Weed Seed Capture

  October 11, 2022   Claudio Rubione
In GROW’s third Farmer Forum of the season, Australian combine experts presented on how to set up a combine header to capture...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management   

Meet Ray Harrington, Founder of the Harrington Seed Destructor

  October 7, 2022   Grow IWM
The Harrington Seed Destructor (HSD) is now an internationally known tool, but it all started more than two decades ago, as the...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      featured   

EPA Visits MD Farms to Talk Weeds & Pesticide Labels

  October 3, 2022   Grow IWM
ROCKVILLE, Md. — A group of more than 40 EPA scientists hit the road on September 13, 2022, for a farm tour of southern...
  Herbicide Resistance      Grow News      Industry News      Herbicide Resistant Weeds      Cover Crops      featured   

Can A Corn Header Capture Weed Seeds?

  September 27, 2022   Grow IWM
Capturing as many weed seeds as possible during the harvest operation is key to optimizing any harvest weed seed control option,...
  Grow News      Harvest Weed Seed Control      featured   

Texas Scientists Use Drone Spot Sprayers to Fight Weeds

  November 29, 2022   Grow IWM
If you’re looking for the future of precision herbicide use, check out the cotton fields of southeastern Texas, near College...
  featured      Herbicide Resistance      Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Last Call for Weed Seed Prevention: Equipment Cleanout

  November 21, 2022   Grow IWM
The 2022 harvest season is winding down, but your farm equipment might be holding onto something you’d rather leave behind:...
  Harvest Weed Seed Management      Prevention      featured      Grow News      Herbicide Resistant Weeds      Mechanical Weed Control   

The Fate of Weed Seeds: Where Do They Go in a Combine?

  November 10, 2022   Grow IWM
Weed seeds vanish from our view when they enter a combine at harvest, but Virginia Tech researchers want to unmask the mystery of...
  Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Missouri Scientists Explore Weed Electrocution in Soybeans

  October 24, 2022   Grow IWM
Imagine taking a direct hit of 15,000 volts of electricity, as you stood in a wide open field, feet planted in the soil. ...
  News From Other Sources      featured      Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Weed Electrocution   

Farmer Forum Recap: How to Set Up Combine Headers for Weed Seed Capture

  October 11, 2022   Claudio Rubione
In GROW’s third Farmer Forum of the season, Australian combine experts presented on how to set up a combine header to capture...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management   

Meet Ray Harrington, Founder of the Harrington Seed Destructor

  October 7, 2022   Grow IWM
The Harrington Seed Destructor (HSD) is now an internationally known tool, but it all started more than two decades ago, as the...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      featured   

EPA Visits MD Farms to Talk Weeds & Pesticide Labels

  October 3, 2022   Grow IWM
ROCKVILLE, Md. — A group of more than 40 EPA scientists hit the road on September 13, 2022, for a farm tour of southern...
  Herbicide Resistance      Grow News      Industry News      Herbicide Resistant Weeds      Cover Crops      featured   
Giant foxtail panicle

How to Identify Summer Grass Weeds by Their Seedhead

  September 22, 2022   Grow IWM
Video by Claudio Rubione  Grasses are tough to tell apart, but they often require different weed management strategies, so...
  Grow News      Herbicide Resistant Weeds      featured   

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...
  Grow News      featured      Herbicide Resistance   

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

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   

Farmer Forum Recap: Combine Set-Up for Threshing Green Material

  December 6, 2022   Grow IWM
In the final Farmer Forum of the 2022 season on November 29, Australian presenters shared their combine threshing secrets for...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management      featured   

The Fate of Weed Seeds: Where Do They Go in a Combine?

  November 10, 2022   Grow IWM
Weed seeds vanish from our view when they enter a combine at harvest, but Virginia Tech researchers want to unmask the mystery of...
  Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Farmer Forum Recap: How to Optimize Threshing Settings for Harvest Weed Seed Control

  October 28, 2022   Grow IWM
In GROW’s fourth Farmer Forum of the season, Australian combine experts took a deep dive into combine settings for threshing...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management      featured   

Does Harvest Weed Seed Control Work in Rice Fields?

  October 26, 2022   Grow IWM
Texas researchers want to know how harvest weed seed control tactics such as the integrated Harrington Seed Destructor (iHSD)...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management      featured      Grow News   

Texas Rice Farmer Tries Out iHSD to Halt Weed Seedbank

  October 13, 2022   Grow IWM
GROW headed to Texas recently to interview Bryan Wiese, owner of Wiese Brothers Farm in Wharton, about his unique decision to try...
  featured      Grow News      Harvest Weed Seed Control   

Farmer Forum Recap: How to Set Up Combine Headers for Weed Seed Capture

  October 11, 2022   Claudio Rubione
In GROW’s third Farmer Forum of the season, Australian combine experts presented on how to set up a combine header to capture...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management   

Meet Ray Harrington, Founder of the Harrington Seed Destructor

  October 7, 2022   Grow IWM
The Harrington Seed Destructor (HSD) is now an internationally known tool, but it all started more than two decades ago, as the...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      featured   

Can A Corn Header Capture Weed Seeds?

  September 27, 2022   Grow IWM
Capturing as many weed seeds as possible during the harvest operation is key to optimizing any harvest weed seed control option,...
  Grow News      Harvest Weed Seed Control      featured   

Farmer Forum Recap: Americans talk Harvest Weed Seed Control with international experts

  September 15, 2022   Grow IWM
Video and article by Claudio Rubione, GROW One advantage of meeting virtually is that people in different countries can gather...
  featured      Grow News      Harvest Weed Seed Control   

A Q&A on chaff lining with Michael Flessner

  September 13, 2022   Grow IWM
What is chaff lining?  Chaff lining is one of the easiest entry points to harvest weed seed control. A combine set up for...
  featured      Harvest Weed Seed Control      Integrated Weed Management Innovations   

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   

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

In the Fields

What Are Your Problem Weeds?

Cheatgrass
Mustard Species in Wheat
Rush Skeletonweed
Russian Thistle
Prickly Lettuce
Mayweed Chamomile
Field Bindweed
Common Barberry
Buckwheat
Jointed Goatgrass
Rattail Fescue
Feral Rye