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.

Recent GROW News & Research Updates

Farm Tour in Wisconsin Seeks to Highlights ESA Impacts to Ag

  February 12, 2025   Grow IWM
What do rattlesnakes, cranberries and vegetables have in common? They were all part of a recent farm tour in Wisconsin, aimed at...
  Grow News      Industry News      News From Other Sources      Herbicide Management   

Farming Peanuts with Cover Crops in Virginia

  February 11, 2025   Grow IWM
“Cover crops” and “peanuts” don’t get used in the same sentence too often. With limited herbicide options available and...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

New Technology Aims to Map Cereal Rye Cover Crop Biomass

  February 4, 2025   Grow IWM
Cover crops are becoming an important tool for weed suppression, and their biomass is among the most accurate predictors of how...
  Integrated Weed Management Innovations      Cover Crops      DIGITAL AGRICULTURE      Precision Weed Management   

Penn State Guide Details Interseeding Cover Crops in Corn Production

  January 28, 2025   Grow IWM
Want to introduce cover crops into your farming operation, but are too tight on time in the fall? Interseeding cover crops into...
  Herbicide Resistant Weeds      Cover Crops      Fact Sheets      Herbicide Management   

Robotics in Agriculture Gets an Assist from USDA-ARS

  January 21, 2025   Grow IWM
Agriculture is poised to benefit greatly from the rising revolution of robotics and artificial intelligence – if we can...
  Industry News      DIGITAL AGRICULTURE      Precision Weed Management      Herbicide Management   

Crush Kochia by Combining Cover Crops with Residual Herbicides

  January 14, 2025   Grow IWM
Invasive kochia has become a common enemy on farms in the western half of the U.S. Its herbicide resistance, coupled with its...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance   

Combining Cover Crops and Herbicide Applications to Manage Weeds in Cotton Production

  January 7, 2025   Grow IWM
When it comes to cotton production, there are few weeds as prevalent or as destructive as herbicide-resistant Palmer amaranth....
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance      Herbicide Management   

Considering Using Cover Crops in Cotton? These Factsheets Can Help!

  December 23, 2024   Grow IWM
Cotton farmers looking to integrate cover crops into their farming practices have a new resource to assist them! That’s thanks...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Fact Sheets   

The Best Cover Crop and Herbicide Applications for Soybean Yields

  December 17, 2024   Grow IWM
You’ve heard the message for years: “Use cover crops and robust herbicide mixes to curb herbicide resistance.” But choosing...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance      Herbicide Management   

Resource Alert: Cover Crop Termination Factsheets Now Available!

  December 10, 2024   Grow IWM
Before you can even begin planting cover crops, you need a plan to kill them off.  Cover crop termination plans are critical...
  Grow News      Integrated Weed Management Innovations      Cover Crops      Fact Sheets      Herbicide Management   

Spraying Herbicides with Drones: An Overview from Virginia Tech

  December 3, 2024   Grow IWM
If you want to see the future of many herbicide applications, look to the skies! “Aerial drones are revolutionizing the...
  Herbicide Management      DIGITAL AGRICULTURE      Precision Weed Management      Grow News      Herbicide Resistant Weeds   

Take Action’s 2025 Herbicide Classification Chart Now Available!

  November 25, 2024   Grow IWM
Knowing which herbicide sites of action are in your sprayer tanks each year is essential to managing and preventing herbicide...
  Take Action      Herbicide Management      Herbicide Resistant Weeds      Industry News   

Farming Peanuts with Cover Crops in Virginia

  February 11, 2025   Grow IWM
“Cover crops” and “peanuts” don’t get used in the same sentence too often. With limited herbicide options available and...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

New Technology Aims to Map Cereal Rye Cover Crop Biomass

  February 4, 2025   Grow IWM
Cover crops are becoming an important tool for weed suppression, and their biomass is among the most accurate predictors of how...
  Integrated Weed Management Innovations      Cover Crops      DIGITAL AGRICULTURE      Precision Weed Management   

Penn State Guide Details Interseeding Cover Crops in Corn Production

  January 28, 2025   Grow IWM
Want to introduce cover crops into your farming operation, but are too tight on time in the fall? Interseeding cover crops into...
  Herbicide Resistant Weeds      Cover Crops      Fact Sheets      Herbicide Management   

Crush Kochia by Combining Cover Crops with Residual Herbicides

  January 14, 2025   Grow IWM
Invasive kochia has become a common enemy on farms in the western half of the U.S. Its herbicide resistance, coupled with its...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance   

Combining Cover Crops and Herbicide Applications to Manage Weeds in Cotton Production

  January 7, 2025   Grow IWM
When it comes to cotton production, there are few weeds as prevalent or as destructive as herbicide-resistant Palmer amaranth....
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance      Herbicide Management   

Considering Using Cover Crops in Cotton? These Factsheets Can Help!

  December 23, 2024   Grow IWM
Cotton farmers looking to integrate cover crops into their farming practices have a new resource to assist them! That’s thanks...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Fact Sheets   

The Best Cover Crop and Herbicide Applications for Soybean Yields

  December 17, 2024   Grow IWM
You’ve heard the message for years: “Use cover crops and robust herbicide mixes to curb herbicide resistance.” But choosing...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance      Herbicide Management   

Resource Alert: Cover Crop Termination Factsheets Now Available!

  December 10, 2024   Grow IWM
Before you can even begin planting cover crops, you need a plan to kill them off.  Cover crop termination plans are critical...
  Grow News      Integrated Weed Management Innovations      Cover Crops      Fact Sheets      Herbicide Management   

End of Life Planning for Cover Crops: Are You Prepared?

  November 5, 2024   Grow IWM
 Farmers should have a complete plan in place before adding cover crops to their rotation. Knowing how and when to terminate...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Herbicide Management   

Tips for Getting Herbicides and Cover Crops to Cooperate

  October 17, 2024   Grow IWM
Farmers can use cover crops for many benefits including weed suppression. But first, they have to make sure another popular weed...
  Herbicide Management      Grow News      Industry News      Cover Crops   

GROW Releases New Herbicide Resistance Resource for the Industry

  October 15, 2024   Grow IWM
As herbicide resistance spreads, so must education on what it is and how to manage it. That’s the goal behind GROW’s newest...
  Herbicide Management      Harvest Weed Seed Control      Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      Weed Electrocution      Precision Weed Management   

How to Manage Cover Crops in Cotton: A Virginia Farmer’s Experience

  September 24, 2024   Grow IWM
Cover crops have a lot to offer Virginia cotton farmer Clay Lowe – namely, weed suppression, nutrient enhancement and soil...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Grow News   

Farm Tour in Wisconsin Seeks to Highlights ESA Impacts to Ag

  February 12, 2025   Grow IWM
What do rattlesnakes, cranberries and vegetables have in common? They were all part of a recent farm tour in Wisconsin, aimed at...
  Grow News      Industry News      News From Other Sources      Herbicide Management   

Farming Peanuts with Cover Crops in Virginia

  February 11, 2025   Grow IWM
“Cover crops” and “peanuts” don’t get used in the same sentence too often. With limited herbicide options available and...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

Crush Kochia by Combining Cover Crops with Residual Herbicides

  January 14, 2025   Grow IWM
Invasive kochia has become a common enemy on farms in the western half of the U.S. Its herbicide resistance, coupled with its...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance   

Combining Cover Crops and Herbicide Applications to Manage Weeds in Cotton Production

  January 7, 2025   Grow IWM
When it comes to cotton production, there are few weeds as prevalent or as destructive as herbicide-resistant Palmer amaranth....
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance      Herbicide Management   

Considering Using Cover Crops in Cotton? These Factsheets Can Help!

  December 23, 2024   Grow IWM
Cotton farmers looking to integrate cover crops into their farming practices have a new resource to assist them! That’s thanks...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Fact Sheets   

The Best Cover Crop and Herbicide Applications for Soybean Yields

  December 17, 2024   Grow IWM
You’ve heard the message for years: “Use cover crops and robust herbicide mixes to curb herbicide resistance.” But choosing...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance      Herbicide Management   

Resource Alert: Cover Crop Termination Factsheets Now Available!

  December 10, 2024   Grow IWM
Before you can even begin planting cover crops, you need a plan to kill them off.  Cover crop termination plans are critical...
  Grow News      Integrated Weed Management Innovations      Cover Crops      Fact Sheets      Herbicide Management   

Spraying Herbicides with Drones: An Overview from Virginia Tech

  December 3, 2024   Grow IWM
If you want to see the future of many herbicide applications, look to the skies! “Aerial drones are revolutionizing the...
  Herbicide Management      DIGITAL AGRICULTURE      Precision Weed Management      Grow News      Herbicide Resistant Weeds   

Farmer Forum Recap: Targeted Spray Technologies in the Field

  November 21, 2024   Grow IWM
In this GROW Farmer Forum, University of Wisconsin weed scientist Dr. Rodrigo Werle and a panel of three farmers from across the...
  Industry News      DIGITAL AGRICULTURE      Precision Weed Management      Grow News      Herbicide Management   

Extension and Farmers Greet Weed Control Option with ‘G’day’

  November 19, 2024   Grow IWM
This article is reprinted with permission from University of Minnesota Extension. In growing crops, much hinges on what happens...
  Grow News      Harvest Weed Seed Management      Mechanical Weed Control      Herbicide Resistant Weeds      Integrated Weed Management Innovations      Harvest Weed Seed Control   

End of Life Planning for Cover Crops: Are You Prepared?

  November 5, 2024   Grow IWM
 Farmers should have a complete plan in place before adding cover crops to their rotation. Knowing how and when to terminate...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Herbicide Management   

Tank Mixing or Herbicide Rotation: Which Strategy is Best?

  October 29, 2024   Grow IWM
A new body of research suggests that tank mixing different herbicide sites of action is more effective at delaying herbicide...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Prevention      Herbicide Resistance      Herbicide Management   

Farming Peanuts with Cover Crops in Virginia

  February 11, 2025   Grow IWM
“Cover crops” and “peanuts” don’t get used in the same sentence too often. With limited herbicide options available and...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

Penn State Guide Details Interseeding Cover Crops in Corn Production

  January 28, 2025   Grow IWM
Want to introduce cover crops into your farming operation, but are too tight on time in the fall? Interseeding cover crops into...
  Herbicide Resistant Weeds      Cover Crops      Fact Sheets      Herbicide Management   

Crush Kochia by Combining Cover Crops with Residual Herbicides

  January 14, 2025   Grow IWM
Invasive kochia has become a common enemy on farms in the western half of the U.S. Its herbicide resistance, coupled with its...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance   

Combining Cover Crops and Herbicide Applications to Manage Weeds in Cotton Production

  January 7, 2025   Grow IWM
When it comes to cotton production, there are few weeds as prevalent or as destructive as herbicide-resistant Palmer amaranth....
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance      Herbicide Management   

Considering Using Cover Crops in Cotton? These Factsheets Can Help!

  December 23, 2024   Grow IWM
Cotton farmers looking to integrate cover crops into their farming practices have a new resource to assist them! That’s thanks...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Fact Sheets   

The Best Cover Crop and Herbicide Applications for Soybean Yields

  December 17, 2024   Grow IWM
You’ve heard the message for years: “Use cover crops and robust herbicide mixes to curb herbicide resistance.” But choosing...
  Grow News      Herbicide Resistant Weeds      Cover Crops      Herbicide Resistance      Herbicide Management   

Spraying Herbicides with Drones: An Overview from Virginia Tech

  December 3, 2024   Grow IWM
If you want to see the future of many herbicide applications, look to the skies! “Aerial drones are revolutionizing the...
  Herbicide Management      DIGITAL AGRICULTURE      Precision Weed Management      Grow News      Herbicide Resistant Weeds   

Take Action’s 2025 Herbicide Classification Chart Now Available!

  November 25, 2024   Grow IWM
Knowing which herbicide sites of action are in your sprayer tanks each year is essential to managing and preventing herbicide...
  Take Action      Herbicide Management      Herbicide Resistant Weeds      Industry News   

Extension and Farmers Greet Weed Control Option with ‘G’day’

  November 19, 2024   Grow IWM
This article is reprinted with permission from University of Minnesota Extension. In growing crops, much hinges on what happens...
  Grow News      Harvest Weed Seed Management      Mechanical Weed Control      Herbicide Resistant Weeds      Integrated Weed Management Innovations      Harvest Weed Seed Control   

The Challenges of Managing Non-Target-Site Herbicide Resistance

  November 12, 2024   Grow IWM
Farmers have a lot of experience identifying, mixing and rotating herbicide sites of action to avoid herbicide resistance. ...
  Herbicide Resistant Weeds      Prevention      Herbicide Resistance      Herbicide Management   

End of Life Planning for Cover Crops: Are You Prepared?

  November 5, 2024   Grow IWM
 Farmers should have a complete plan in place before adding cover crops to their rotation. Knowing how and when to terminate...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Herbicide Management   

Tank Mixing or Herbicide Rotation: Which Strategy is Best?

  October 29, 2024   Grow IWM
A new body of research suggests that tank mixing different herbicide sites of action is more effective at delaying herbicide...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Prevention      Herbicide Resistance      Herbicide Management   

Extension and Farmers Greet Weed Control Option with ‘G’day’

  November 19, 2024   Grow IWM
This article is reprinted with permission from University of Minnesota Extension. In growing crops, much hinges on what happens...
  Grow News      Harvest Weed Seed Management      Mechanical Weed Control      Herbicide Resistant Weeds      Integrated Weed Management Innovations      Harvest Weed Seed Control   

GROW Releases New Herbicide Resistance Resource for the Industry

  October 15, 2024   Grow IWM
As herbicide resistance spreads, so must education on what it is and how to manage it. That’s the goal behind GROW’s newest...
  Herbicide Management      Harvest Weed Seed Control      Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      Weed Electrocution      Precision Weed Management   

Narrow Windrow Burning for Weed Seed Control is Risky Business

  September 3, 2024   Grow IWM
Sometimes when a plan looks good on paper, it doesn’t necessarily mean its execution is the best idea. Weed scientists are...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management   

Learn When Weeds Shed Their Seeds (And Why It Matters!)

  August 13, 2024   Grow IWM
A weed without seeds at harvest time is a lost cause for harvest weed seed control. That’s why GROW researchers from 14...
  Grow News      Harvest Weed Seed Control      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Fact Sheets   

A Weed Seed Killing Machine: Testing the integrated Harrington Seed Destructor

  August 6, 2024   Grow IWM
With a rise in herbicide-resistant weeds such as Palmer amaranth and common ragweed escaping in-season control methods, weed...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management   

Learn from the Best: GROW Farmer Case Studies 

  July 22, 2024   Grow IWM
Every good ag researcher knows the power of an innovative farmer. Take, for example, the no-till movement. As the Dust Bowl raged...
  Weed Electrocution      featured      Cover Crops      Integrated Weed Management Innovations      Harvest Weed Seed Control      Grow News   

Can Seed Impact Mills Kill Weed Seeds in Cotton?

  July 2, 2024   Grow IWM
Seed impact mills have shown promise as a weed control option in crops like wheat and soybeans. But what about cotton? A joint...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management   

Weed Science Field Days: What’s In It For Me? 

  May 28, 2024   Grow IWM
It happens like clockwork almost every year, starting in June. Wagons bounce over field ruts, filled with people clutching...
  Herbicide Resistant Weeds      Integrated Weed Management Innovations      Harvest Weed Seed Control      Industry News      Grow News      Weed Electrocution      Precision Weed Management   

Can Weeds Adapt to Beat Harvest Weed Seed Control?

  May 7, 2024   Grow IWM
Weeds think they’re pretty smart. Since modern agriculture began, weeds have been evolving and lying in wait to grow again –...
  Grow News      Industry News      Harvest Weed Seed Control      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management   

GROW Reports on New Harvest Weed Seed Control Research in Australia

  March 19, 2024   Grow IWM
I recently returned from a trip to Western Australia to meet with weed scientist Dr. Michael Walsh, along with fellow GROW team...
  Harvest Weed Seed Management      News From Other Sources      Herbicide Resistant Weeds      Integrated Weed Management Innovations      Harvest Weed Seed Control      Grow News   

Allow Us to Introduce Ourselves (Again!)

  March 14, 2024   Grow IWM
Like the science we study and share, GROW is evolving and expanding quickly, and we decided it was time for our website to...
  Herbicide Resistant Weeds      Integrated Weed Management Innovations      Harvest Weed Seed Control      Grow News      Precision Weed Management      DIGITAL AGRICULTURE      Cover Crops   

Evaluating a New Weed Killer: Blue Light and Heat

  March 5, 2024   Grow IWM
Harvest weed seed control is a growing area of interest and study for farmers and researchers looking to target weed seeds during...
  Harvest Weed Seed Management      Herbicide Resistant Weeds      Integrated Weed Management Innovations      Harvest Weed Seed Control      Industry News   

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 widespread use of no-till and limited cultivation for weed control, improving soil health. However, overreliance on a few key herbicides has prompted a growing epidemic of 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) is a system that layers multiple weed control methods to suppress and manage weeds across a growing season, by targeting weeds and the seedbank in different ways and at different stages of development. The result is a robust weed management program that doesn’t rely on a single mode of action or management tactic.  IWM techniques include:

In the Fields

What Are Your Problem Weeds?

Velvetleaf
Giant Foxtail
Broadleaf Signalgrass
Redroot & Smooth Pigweed
Texas Millet (Panicum)
Canada Thistle
Common Pokeweed
Rush Skeletonweed
Russian Thistle
Prickly Lettuce
Mayweed Chamomile