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Herbicide Recommendations for Evergreen or Conifer Control: Stem Foliage Treatments with Water as a Carrier

Author: OMAFRA Staff
Creation Date: 25 November 2002
Last Reviewed: 20 June 2008

Pub 75: Guide to Weed Control > Roadsides and Non-Crop Areas > Herbicide Recommendations for Evergreen or Conifer Control: Stem Foliage Treatments with Water as a Carrier


Excerpt from 2008 Chapter 18, Publication 75, Guide to Weed Control, Order this publication

Cover of Publication 75, Guide to Weed ControlTable of Contents

  1. Introduction
  2. Tordon 101 for spot spraying
  3. Tordon 101 for constant volume foliar application
  4. Vanquish or Oracle + 2,4-D
  5. Vanquish or Oracle + Diphenoprop or Desormone
  6. Roadsides & Brush Control Herbicide Rating Tables
    • Susceptibility of Woody Plants to Various Herbicides & Mixtures as Foliage Sprays (Table 18-1 ) (PDF 51k)
    • Classification of Weeds According to Response to Various Foliage Sprays (Table 18-2 ) (PDF 62k)
  7. Related Links

 

Introduction

All of the treatments are applied so as to thoroughly wet all foliage. Use low pressure and apply from 500-1500 L/ha solution (200-600 L/ac), depending on the amount of foliage. Thorough coverage is particularly important and the addition of a wetting agent will increase effectiveness.

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Tordon 101 for spot spraying
Trade Name
Tordon 101 for spot spraying
Active Ingredient picloram/2,4-D
Formulation 305 g/L (1:3.7)
Rate per hectare (active) 3.05 kg/1000 L
Rate per hectare (product) 10 L/1000 L

Precautions

  • Apply when the conifers are actively growing in early summer.
  • Spray should thoroughly wet all plant parts including stem, foliage, and root collar.
  • Add 0.25% v/v solution of Sylgard 309 surfactant when controlling conifers
  • A permit is required for purchase and use.
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Tordon 101 for constant volume foliar application
Trade Name
Active Ingredient picloram/2,4-D
Formulation 305 g/L (1:3.7)
Rate per hectare (active) 6.71 to 7.62 kg/ha
Rate per hectare (product) 22 to 25 L/ha
Rate per acre (product) 7.2 to 10 L/ac

Precautions

  • Apply in 450 L/ha (180 L/ac) water as a constant volume foliar application during the period of active conifer growth in early summer.
  • Add 0.25% v/v solution of Sylgard 309 surfactant when controlling conifers
  • A permit for purchase and use is required.

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Vanquish or Oracle + 2,4-D
Trade Name
Active Ingredient
dicamba
or dicamba
+ 2,4-D
Formulation
480 g/L
480 g/L
470 g/L
Rate per hectare (active)
1.9 kg/1000 L
1.9 kg/1000 L
3.8 kg/1000 L
Rate per hectare (product)
4 L/1000 L
4 L/1000 L
8 L/1000 L

Precautions

  • Apply as amines in early summer.
  • Thorough coverage is needed.
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Vanquish or Oracle + Diphenoprop or + Desormone
Trade Name
Active Ingredient
dicamba
or dicamba
+ dichlorprop/2,4-D
or + dichlorprop/2,4-D
Formulation
480 g/L
480 g/L
679 g/L
680 g/L
Rate per hectare (active)
2.5 kg/1000 L
2.5 kg/1000 L
4.9 kg/1000 L
4.9 kg/1000 L
Rate per hectare (product)
5.2 L/1000 L
5.2 L/1000 L
7.15 L/1000 L
7.15 L/1000 L

Precautions

  • Apply in spring or early summer.
  • Thorough coverage is needed.
  • Follow instructions on Vanquish label for tank mix.
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Related Links

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