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Arkansas Field Crop Weed Control Resources

Extension specialists and agents offer the latest in research-based, practical recommendations for weed identification and management. Below are publications and links to resources to aid producers in the control of weeds in their fields.

plane applying spray to a field

 2021 Arkansas Pesticide Training Summary

Quick reference guide for identifying required pesticide application trainings and certifications for Arkansas in 2021.

 Herbicide Application and Sprayer Calibration 

This file provides information for general herbicide application and mixing techniques as well as sprayer calibration procedures.

pigweed in a field

Distribution and Management of Herbicide-Resistant Palmer Amaranth in Arkansas

This fact sheet provides an up-to-date look at the current distribution of Palmer amaranth resistance to multiple herbicide modes-of-action and provides recommendations for successful management across cropping systems.

Prevention and Control of Glyphosate Resistant Pigweed in Soybean and Cotton 

Glyphosate resistant pigweed has become the most economically significant weed pest of both cotton and soybean. This fact sheet contains alternative control options and recommendations for pigweed control.

Glyphosate Resistant Ryegrass Control 

This publication offers resources for prevention and management of Italian ryegrass which has become resistant to glyphosate as well as many wheat herbicides commonly used in Arkansas. 

Other resistance management resources:

weeds in a field

Winter Cover Crops: Recommended Seeding Rates & Establishment Practices

This quick reference guide provides recommendations for seeding rates and establishment practices (planting timing and depth) for common winter cover crops in Arkansas.

Management of Italian Ryegrass in Agronomic Crops

This fact sheet provides a quick look at identification keys for Italian ryegrass, confirmed herbicide resistance in Arkansas, and recommended strategies for successful management across cropping systems.

Herbicide Resistance Traits: Quick Reference Guide

This guide will help to quickly identify what herbicides each herbicide-resistant trait provides resistance to in corn, cotton, rice, and soybean.

Metolachlor Herbicides: What Are the Facts?

This fact sheet provides information regarding the metolachlor chemistry, how to effectively use the herbicide, and recent discoveries of herbicide resistance in the state of Arkansas.

Zero Tolerance Pigweed Management 

A community based program that focuses on reduction of pigweed seed in the soil seedbank.  Reducing pigweed seed production each year is really the only way to stay ahead of resistance and cost effectively manage the number of pigweed that emerge in crop fields.

Sunflowers Grown for Dove Hunting 

Weed control is one of the most important pest management issues in sunflowers whether grown for production or hunting.  

Row Crop Plant-Back Intervals for Common Herbicides 

This publication gives producers a table display of herbicide trade and common names and their labeled plant-back restrictions for six major row crops grown in Arkansas. 

Flag The Technology 

A simple and effective method for identifying fields based on the herbicide tolerant technology planted in the field.

2021 Metribuzin Tolerance of Soybean Varieties

Metribuzin provides residual control of an assortment of annual grasses and broadleaf weeds in soybean, including Palmer amaranth; however, the handicap to metribuzin use is the sensitivity of soybean varieties to this herbicide. The University of Arkansas System Division of Agriculture conducted an extensive greenhouse screening of soybean varieties. This publication breaks down varieties into an injury scale of slight, moderate, or severe susceptibility to metribuzin.

MP44 Recommended Chemicals for Weed and Brush Control  

A comprehensive guide to weed management in various areas including: crops, pasture, vegetables and homeowner yards. Updated annually with labeled herbicides for various uses. Information on weed resistance, sprayer calibration and crop tolerance.

cows far away in a pasture

Pasture Weed and Brush Control 

Properly applied weed control is one of the most cost-effective management practices available to forage producers. Many weed control practices are relatively inexpensive when compared to other pasture improvement methods.