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

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 Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management   

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   

Join a GROW Farmer Forum on Targeted Spray Technologies in the Field

  October 24, 2024   Grow IWM
GROW will be hosting a Farmer Forum on Monday, November 18, 2024, at 11 a.m. ET. The forum’s farmer panel and moderator...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      DIGITAL AGRICULTURE      Precision Weed Management   

What’s the Difference Between Target-Site & Non-Target-Site Herbicide Resistance?

  October 22, 2024   Grow IWM
“Target-site resistance” and “non-target-site resistance” may seem like stuffy, scientific terms best suited to a...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Prevention      Herbicide Resistance      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...
  Grow News      Industry News      Cover Crops      Herbicide Management   

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...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      Weed Electrocution      Precision Weed Management      Herbicide Management   

Listen In: What is Happening with the Endangered Species Act and Herbicide Labels?

  October 8, 2024   Grow IWM
The acronym “ESA” is fast-becoming a dreaded word in agriculture, as farmers, scientists and pesticide registrants anxiously...
  Industry News      Herbicide Resistant Weeds      Herbicide Management   

Herbicide Savings From Precision Spraying Technology

  October 3, 2024   Grow IWM
This article is reprinted with permission from Iowa State University Extension and Outreach Key Points Precision Spraying...
  Industry News      News From Other Sources      DIGITAL AGRICULTURE      Precision Weed Management   

Eyes in the Sky and Eyes on the Ground: The Range of Camera-based Weed Detection

  October 1, 2024   Grow IWM
There’s eyes everywhere these days – even in our crop fields. Whether it’s tractor-mounted sensors skimming just inches...
  Herbicide Resistant Weeds      News From Other Sources      DIGITAL AGRICULTURE      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...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

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...
  Grow News      Industry News      Cover Crops      Herbicide Management   

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...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      Weed Electrocution      Precision Weed Management      Herbicide 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...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

Drone Seeding Cover Crops into Standing Soybeans

  August 27, 2024   Grow IWM
The following is reprinted with permission from Penn State Extension. Cover crops can be challenging to establish after soybeans....
  Integrated Weed Management Innovations      News From Other Sources      Cover Crops      DIGITAL AGRICULTURE      Precision Weed Management   

Catch Up On GROW’s Latest Cover Crop Research

  July 30, 2024   Grow IWM
GROW was recently featured in the Illinois Cover Crop On-Farm Network’s webinar series, “Weeds & Diseases & Pests, Oh...
  Grow News      Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

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...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Cover Crops      featured      Weed Electrocution   

Study Shines Light on Drill-interseeded Cover Crops in Corn

  May 2, 2024   Grow IWM
The following is reprinted from Weed Science, a journal of the Weed Science Society of America. Recently published research in...
  Industry News      Integrated Weed Management Innovations      News From Other Sources      Cover Crops   

Cover Crops and Residual Herbicides Team Up Against Palmer Amaranth

  April 30, 2024   Grow IWM
Palmer amaranth is famous for dodging herbicide control options, but it appears that a one-two punch of cover crop residue and...
  Grow News      Industry News      Herbicide Resistant Weeds      Cover Crops   

New Research on How to Apply Residual Herbicides When Planting Green

  April 16, 2024   Grow IWM
Planting soybeans into a green, living cover crop can require some extra management decisions, such as when to apply those...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

The Lowdown on Roller Crimpers

  April 2, 2024   Grow IWM
Roller crimpers can be a valuable tool for terminating cover crops or simply managing cover crop residue, especially when...
  Grow News      Integrated Weed Management Innovations      Cover Crops   

A Look at Planter Adjustments for Planting into Cover Crops

  March 26, 2024   Grow IWM
 When adjusting your planter to run through high-residue cover crops, Trey Hill has some advice: Don’t get too...
  Grow News      Integrated Weed Management Innovations      Cover Crops   

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 Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed 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   

Join a GROW Farmer Forum on Targeted Spray Technologies in the Field

  October 24, 2024   Grow IWM
GROW will be hosting a Farmer Forum on Monday, November 18, 2024, at 11 a.m. ET. The forum’s farmer panel and moderator...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      DIGITAL AGRICULTURE      Precision Weed 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...
  Grow News      Industry News      Cover Crops      Herbicide Management   

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...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      Weed Electrocution      Precision Weed Management      Herbicide 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...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

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

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   

Catch Up On GROW’s Latest Cover Crop Research

  July 30, 2024   Grow IWM
GROW was recently featured in the Illinois Cover Crop On-Farm Network’s webinar series, “Weeds & Diseases & Pests, Oh...
  Grow News      Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

Bonus Newsletter for GROW Subscribers

  July 29, 2024   Grow IWM
Starting in August, GROW subscribers will have a new e-monthly newsletter coming their way! Once a month, you’ll get a...
  Industry News      News From Other Sources      Grow 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 Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management   

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   

Join a GROW Farmer Forum on Targeted Spray Technologies in the Field

  October 24, 2024   Grow IWM
GROW will be hosting a Farmer Forum on Monday, November 18, 2024, at 11 a.m. ET. The forum’s farmer panel and moderator...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      DIGITAL AGRICULTURE      Precision Weed Management   

What’s the Difference Between Target-Site & Non-Target-Site Herbicide Resistance?

  October 22, 2024   Grow IWM
“Target-site resistance” and “non-target-site resistance” may seem like stuffy, scientific terms best suited to a...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Prevention      Herbicide Resistance      Herbicide Management   

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...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      Weed Electrocution      Precision Weed Management      Herbicide Management   

Listen In: What is Happening with the Endangered Species Act and Herbicide Labels?

  October 8, 2024   Grow IWM
The acronym “ESA” is fast-becoming a dreaded word in agriculture, as farmers, scientists and pesticide registrants anxiously...
  Industry News      Herbicide Resistant Weeds      Herbicide Management   

Eyes in the Sky and Eyes on the Ground: The Range of Camera-based Weed Detection

  October 1, 2024   Grow IWM
There’s eyes everywhere these days – even in our crop fields. Whether it’s tractor-mounted sensors skimming just inches...
  Herbicide Resistant Weeds      News From Other Sources      DIGITAL AGRICULTURE      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...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

How Weed Electrocution Fits into a Maryland Farm

  September 17, 2024   Grow IWM
The sparks are flying on Aaron Cooper’s farm, Cutfresh Organics, on the Eastern Shore of Maryland. Not the romantic kind, mind...
  Mechanical Weed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Weed Electrocution   

A Deep Dive on Precision Spraying with the WEED-IT

  August 20, 2024   Grow IWM
As the industry of precision sprayers expands, farmers are sorting through a growing list of commercial options. For Jesse...
  Industry News      Precision Weed Management      DIGITAL AGRICULTURE      Mechanical Weed Control      Herbicide Resistant Weeds      Integrated Weed Management Innovations   

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 Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management   

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...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      Weed Electrocution      Precision Weed Management      Herbicide 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...
  Integrated Weed Management Innovations      Grow News      Harvest Weed Seed Control      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...
  Mechanical Weed Control      Harvest Weed Seed Management      Fact Sheets      Grow News      Harvest Weed Seed Control      Herbicide Resistant Weeds   

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...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Cover Crops      featured      Weed Electrocution   

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...
  Grow News      Industry News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      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...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Harvest Weed Seed Management   

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...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      DIGITAL AGRICULTURE      Precision Weed Management   

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...
  Industry News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management   

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?

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