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

Updates on Harvest Weed Seed Control from WSSA Members Across the Country

  March 14, 2023   Grow IWM
Harvest weed seed control research is growing across the U.S., with farmers and researchers trying out chaff lining and seed...
  Mechanical Weed Control      Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations   

Join a GROW Farmer Forum on Cover Crop Termination

  March 10, 2023   Grow IWM
GROW will be hosting its its first Farmer Forum of the 2023 season on Wednesday, March 29, at 2 p.m. EDT. Listen in —...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

How Does Cover Crop Residue Interact with Soil Residual Herbicides?

  March 7, 2023   Grow IWM
We know cover crops can provide a physical barrier on top of the soil to smother and suppress emerging weeds. But many...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention      featured   

GROW is Hiring a Post-Doctoral Researcher

  March 2, 2023   Grow IWM
A unique opportunity is now open for a post-doctoral researcher to join GROW (www.growiwm.org), a dynamic research and extension...
  Grow News      featured   

How a National Image Repository Can Transform Agriculture

  February 28, 2023   Grow IWM
The National Agricultural Image Repository (NAIR) is a large-scale, multi-state effort to build and share weed and crop images,...
  DIGITAL AGRICULTURE      Grow News      featured   

The Ag Image Repository: A First Step in Accessible Precision Ag

  February 21, 2023   Grow IWM
So much of precision agriculture – such as precision spraying technology or weed-identifying apps – relies on images. ...
  DIGITAL AGRICULTURE      Grow News      featured   

Three Weird Ways Weed Seeds Can Travel

  February 14, 2023   Grow IWM
Weeds have plenty of biological tricks to spread seeds on their own, but they also get an assist from a few surprising sources,...
  Grow News      Herbicide Resistant Weeds      Prevention      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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Grow News      featured      Industry News   

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...
  Cover Crops      featured      Grow 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...
  Weed Electrocution      Grow News      Cover Crops      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   

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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      featured      Grow News   

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,...
  Cover Crops      featured      Industry News      Integrated Weed Management Innovations      News From Other Sources   

Join a GROW Farmer Forum on Cover Crop Termination

  March 10, 2023   Grow IWM
GROW will be hosting its its first Farmer Forum of the 2023 season on Wednesday, March 29, at 2 p.m. EDT. Listen in —...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

How Does Cover Crop Residue Interact with Soil Residual Herbicides?

  March 7, 2023   Grow IWM
We know cover crops can provide a physical barrier on top of the soil to smother and suppress emerging weeds. But many...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention      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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Grow News      featured      Industry News   

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...
  Cover Crops      featured      Grow 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...
  Weed Electrocution      Grow News      Cover Crops      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   

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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      featured      Grow News   

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,...
  Cover Crops      featured      Industry News      Integrated Weed Management Innovations      News From Other Sources   

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...
  Cover Crops      Prevention      featured      Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

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...
  featured      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   

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   

Updates on Harvest Weed Seed Control from WSSA Members Across the Country

  March 14, 2023   Grow IWM
Harvest weed seed control research is growing across the U.S., with farmers and researchers trying out chaff lining and seed...
  Mechanical Weed Control      Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations   

Join a GROW Farmer Forum on Cover Crop Termination

  March 10, 2023   Grow IWM
GROW will be hosting its its first Farmer Forum of the 2023 season on Wednesday, March 29, at 2 p.m. EDT. Listen in —...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

GROW is Hiring a Post-Doctoral Researcher

  March 2, 2023   Grow IWM
A unique opportunity is now open for a post-doctoral researcher to join GROW (www.growiwm.org), a dynamic research and extension...
  Grow News      featured   

How a National Image Repository Can Transform Agriculture

  February 28, 2023   Grow IWM
The National Agricultural Image Repository (NAIR) is a large-scale, multi-state effort to build and share weed and crop images,...
  DIGITAL AGRICULTURE      Grow News      featured   

The Ag Image Repository: A First Step in Accessible Precision Ag

  February 21, 2023   Grow IWM
So much of precision agriculture – such as precision spraying technology or weed-identifying apps – relies on images. ...
  DIGITAL AGRICULTURE      Grow News      featured   

Three Weird Ways Weed Seeds Can Travel

  February 14, 2023   Grow IWM
Weeds have plenty of biological tricks to spread seeds on their own, but they also get an assist from a few surprising sources,...
  Grow News      Herbicide Resistant Weeds      Prevention      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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Grow News      featured      Industry News   

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...
  Cover Crops      featured      Grow 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...
  Weed Electrocution      Grow News      Cover Crops      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   

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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      featured      Grow News   

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

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...
  Cover Crops      Prevention      featured      Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Join a GROW Farmer Forum on Cover Crop Termination

  March 10, 2023   Grow IWM
GROW will be hosting its its first Farmer Forum of the 2023 season on Wednesday, March 29, at 2 p.m. EDT. Listen in —...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

How Does Cover Crop Residue Interact with Soil Residual Herbicides?

  March 7, 2023   Grow IWM
We know cover crops can provide a physical barrier on top of the soil to smother and suppress emerging weeds. But many...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention      featured   

Three Weird Ways Weed Seeds Can Travel

  February 14, 2023   Grow IWM
Weeds have plenty of biological tricks to spread seeds on their own, but they also get an assist from a few surprising sources,...
  Grow News      Herbicide Resistant Weeds      Prevention      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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Grow News      featured      Industry News   

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...
  Weed Electrocution      Grow News      Cover Crops      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   

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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      featured      Grow News   

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

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...
  Cover Crops      Prevention      featured      Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

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

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

Updates on Harvest Weed Seed Control from WSSA Members Across the Country

  March 14, 2023   Grow IWM
Harvest weed seed control research is growing across the U.S., with farmers and researchers trying out chaff lining and seed...
  Mechanical Weed Control      Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      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...
  Weed Electrocution      Grow News      Cover Crops      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   

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

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

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

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

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

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

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

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,...
  featured      Grow News      Harvest Weed Seed Control   

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