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

Four Takeaways on Cover Crops and Weed Control from WSSA

  February 7, 2023   Grow IWM
Using cover crops for weed suppression can be complicated, so it’s little surprise that the past decade’s worth of research...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Grow News      featured      Industry News      Integrated Weed Management Innovations   

A Deep Dive Into Mapping Fields with High Speed Cameras

  January 31, 2023   Grow IWM
Have a field brimming with thousands of weeds or cover crops and no idea what all is out there?  Søren Skovsen is working...
  featured      Grow News      Integrated Weed Management Innovations      Cover Crops   

How to Manage Weeds in the Face of Regulation and Resistance

  January 24, 2023   Grow IWM
There’s a double threat looming for farmers using herbicides alone to manage weeds: regulation and resistance. Both are...
  Industry News      Harvest Weed Seed Control      Harvest Weed Seed Management      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      Herbicide Resistance      Mechanical Weed Control      News From Other Sources      Weed Electrocution      Grow News      Cover Crops   

Mapping Tools Offer Farmers a Big Picture View of Crop Management  

  January 17, 2023   Grow IWM
When moving through a field row by row, weed by weed, it can be hard for farmers to see the big picture. Researchers from GROW...
  Herbicide Resistant Weeds      Cover Crops      featured      Grow News      Integrated Weed Management Innovations   

Explore How Planting Green Affects Crop Insects and Disease

  January 9, 2023   Grow IWM
Planting green can be a risky business. The practice of planting cash crops into green, living cover crops is gaining popularity,...
  featured      Industry News      Integrated Weed Management Innovations      News From Other Sources      Cover Crops   

Are You a Fan of DIY Weed Control? Try Chaff Lining.

  January 3, 2023   Grow IWM
Harvest weed seed control doesn’t have to be fancy or expensive. Just ask Michael Flessner, Extension Weed Specialist at...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management      Prevention      featured      Grow News      Harvest Weed Seed Control   

GROW Resources on Cover Crops and Weed Suppression 

  December 20, 2022   Grow IWM
Cover crops can be an important part of a farmer’s weed control strategy. But successfully using cover crops for weed...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      featured   

The Australian Weed Control Revolution

  December 13, 2022   Grow IWM
Harvest weed seed control is an Australian innovation born of necessity. Farmers have long relied heavily on herbicides in the...
  Prevention      Industry News      featured      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Herbicide Resistance      News From Other Sources      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...
  featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management   

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...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      featured      Herbicide Resistance   

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...
  Prevention      featured      Grow News      Integrated Weed Management Innovations      Cover Crops   

Four Takeaways on Cover Crops and Weed Control from WSSA

  February 7, 2023   Grow IWM
Using cover crops for weed suppression can be complicated, so it’s little surprise that the past decade’s worth of research...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Grow News      featured      Industry News      Integrated Weed Management Innovations   

A Deep Dive Into Mapping Fields with High Speed Cameras

  January 31, 2023   Grow IWM
Have a field brimming with thousands of weeds or cover crops and no idea what all is out there?  Søren Skovsen is working...
  featured      Grow News      Integrated Weed Management Innovations      Cover Crops   

How to Manage Weeds in the Face of Regulation and Resistance

  January 24, 2023   Grow IWM
There’s a double threat looming for farmers using herbicides alone to manage weeds: regulation and resistance. Both are...
  Industry News      Harvest Weed Seed Control      Harvest Weed Seed Management      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      Herbicide Resistance      Mechanical Weed Control      News From Other Sources      Weed Electrocution      Grow News      Cover Crops   

Mapping Tools Offer Farmers a Big Picture View of Crop Management  

  January 17, 2023   Grow IWM
When moving through a field row by row, weed by weed, it can be hard for farmers to see the big picture. Researchers from GROW...
  Herbicide Resistant Weeds      Cover Crops      featured      Grow News      Integrated Weed Management Innovations   

Explore How Planting Green Affects Crop Insects and Disease

  January 9, 2023   Grow IWM
Planting green can be a risky business. The practice of planting cash crops into green, living cover crops is gaining popularity,...
  featured      Industry News      Integrated Weed Management Innovations      News From Other Sources      Cover Crops   

GROW Resources on Cover Crops and Weed Suppression 

  December 20, 2022   Grow IWM
Cover crops can be an important part of a farmer’s weed control strategy. But successfully using cover crops for weed...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      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...
  Prevention      featured      Grow News      Integrated Weed Management Innovations      Cover Crops   

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...
  Cover Crops      featured      Herbicide Resistance      Grow News      Industry News      Herbicide Resistant Weeds   

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...
  Prevention      Industry News      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   

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

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...
  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   

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. ...
  Industry News      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   

Four Takeaways on Cover Crops and Weed Control from WSSA

  February 7, 2023   Grow IWM
Using cover crops for weed suppression can be complicated, so it’s little surprise that the past decade’s worth of research...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Grow News      featured      Industry News      Integrated Weed Management Innovations   

A Deep Dive Into Mapping Fields with High Speed Cameras

  January 31, 2023   Grow IWM
Have a field brimming with thousands of weeds or cover crops and no idea what all is out there?  Søren Skovsen is working...
  featured      Grow News      Integrated Weed Management Innovations      Cover Crops   

How to Manage Weeds in the Face of Regulation and Resistance

  January 24, 2023   Grow IWM
There’s a double threat looming for farmers using herbicides alone to manage weeds: regulation and resistance. Both are...
  Industry News      Harvest Weed Seed Control      Harvest Weed Seed Management      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      Herbicide Resistance      Mechanical Weed Control      News From Other Sources      Weed Electrocution      Grow News      Cover Crops   

Mapping Tools Offer Farmers a Big Picture View of Crop Management  

  January 17, 2023   Grow IWM
When moving through a field row by row, weed by weed, it can be hard for farmers to see the big picture. Researchers from GROW...
  Herbicide Resistant Weeds      Cover Crops      featured      Grow News      Integrated Weed Management Innovations   

Are You a Fan of DIY Weed Control? Try Chaff Lining.

  January 3, 2023   Grow IWM
Harvest weed seed control doesn’t have to be fancy or expensive. Just ask Michael Flessner, Extension Weed Specialist at...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management      Prevention      featured      Grow News      Harvest Weed Seed Control   

GROW Resources on Cover Crops and Weed Suppression 

  December 20, 2022   Grow IWM
Cover crops can be an important part of a farmer’s weed control strategy. But successfully using cover crops for weed...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      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...
  featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management   

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...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      featured      Herbicide Resistance   

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...
  Prevention      featured      Grow News      Integrated Weed Management Innovations      Cover Crops   

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   

Four Takeaways on Cover Crops and Weed Control from WSSA

  February 7, 2023   Grow IWM
Using cover crops for weed suppression can be complicated, so it’s little surprise that the past decade’s worth of research...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Grow News      featured      Industry News      Integrated Weed Management Innovations   

How to Manage Weeds in the Face of Regulation and Resistance

  January 24, 2023   Grow IWM
There’s a double threat looming for farmers using herbicides alone to manage weeds: regulation and resistance. Both are...
  Industry News      Harvest Weed Seed Control      Harvest Weed Seed Management      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      Herbicide Resistance      Mechanical Weed Control      News From Other Sources      Weed Electrocution      Grow News      Cover Crops   

Mapping Tools Offer Farmers a Big Picture View of Crop Management  

  January 17, 2023   Grow IWM
When moving through a field row by row, weed by weed, it can be hard for farmers to see the big picture. Researchers from GROW...
  Herbicide Resistant Weeds      Cover Crops      featured      Grow News      Integrated Weed Management Innovations   

Are You a Fan of DIY Weed Control? Try Chaff Lining.

  January 3, 2023   Grow IWM
Harvest weed seed control doesn’t have to be fancy or expensive. Just ask Michael Flessner, Extension Weed Specialist at...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management      Prevention      featured      Grow News      Harvest Weed Seed Control   

GROW Resources on Cover Crops and Weed Suppression 

  December 20, 2022   Grow IWM
Cover crops can be an important part of a farmer’s weed control strategy. But successfully using cover crops for weed...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      featured   

The Australian Weed Control Revolution

  December 13, 2022   Grow IWM
Harvest weed seed control is an Australian innovation born of necessity. Farmers have long relied heavily on herbicides in the...
  Prevention      Industry News      featured      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Herbicide Resistance      News From Other Sources      Harvest Weed Seed Management   

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...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      featured      Herbicide Resistance   

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...
  featured      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control   

How to Manage Weeds in the Face of Regulation and Resistance

  January 24, 2023   Grow IWM
There’s a double threat looming for farmers using herbicides alone to manage weeds: regulation and resistance. Both are...
  Industry News      Harvest Weed Seed Control      Harvest Weed Seed Management      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      Herbicide Resistance      Mechanical Weed Control      News From Other Sources      Weed Electrocution      Grow News      Cover Crops   

Are You a Fan of DIY Weed Control? Try Chaff Lining.

  January 3, 2023   Grow IWM
Harvest weed seed control doesn’t have to be fancy or expensive. Just ask Michael Flessner, Extension Weed Specialist at...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management      Prevention      featured      Grow News      Harvest Weed Seed Control   

The Australian Weed Control Revolution

  December 13, 2022   Grow IWM
Harvest weed seed control is an Australian innovation born of necessity. Farmers have long relied heavily on herbicides in the...
  Prevention      Industry News      featured      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Herbicide Resistance      News From Other Sources      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...
  featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management   

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)...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management      featured   

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...
  Grow News      Harvest Weed Seed Control      featured   

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...
  featured      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control   

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...
  Grow News      Harvest Weed Seed Control      featured   

In the Fields

What Are Your Problem Weeds?

Texas Panicum
Canada Thistle
Common Pokeweed
Cheatgrass
Mustard Species in Wheat
Rush Skeletonweed
Russian Thistle
Prickly Lettuce
Mayweed Chamomile
Field Bindweed
Common Barberry
Buckwheat