Herbicide Recommendations for Corn: Preplant Burndown and Residual Control

Table of Contents

1. Introduction
2. Corn Herbicide Weed Control Ratings (Table 9-1) (PDF file - 214kb)
   • Corn Herbicide Weed Control Ratings: Annual Grasses
   • Corn Herbicide Weed Control Ratings: Broadleaf Weeds
   • Corn Herbicide Weed Control Ratings: Perennial Weeds
3. Other Corn Weed Control Recommendations
• Soil Applied Grass Herbicides
• Soil Applied Broadleaf Herbicides
• Soil Applied Grass and Broadleaf Herbicides
• Postemergence Grass Herbicides
• Postemergence Broadleaf Herbicides
• Postemergence Grass and Broadleaf Herbicides
• Postemergence Grass and Broadleaf Herbicides for Liberty Link (glufosinate tolerant) hybrids only
• Postemergence Grass and Broadleaf Herbicides for Roundup Ready (glyphosate tolerant) hybrids only
• Directed Postemergence
• Directed Postemergence for Liberty tolerant hybrids only
4. Corn Leaf Stages
5. Related Links

Introduction

• Non-selective herbicides such as glyphosate and Gramoxone are used to control emerged weeds prior to no-till planting. Tank-mixing of a residual herbicide with glyphosate or Gramoxone can be used to improve application efficiency with a "one-pass" weed management program.
• Refer to Chapter 6, for preplant application rates for glyphosate and Gramoxone.
• It is also important to note that when targeting perennial weeds, the addition of a triazine-based herbicide (i.e. atrazine, Converge Pro, Primextra II Magnum) will reduce the level of activity achieved with glyphosate. Increasing the rate of glyphosate should overcome this antagonism.
  

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Related Links

... on general Weed topics
... on weed identification, order OMAFRA Publication 505: Ontario Weeds
... on weed control, order OMAFRA Publication 75: Guide To Weed Control

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