Preplant and Postharvest Weed Control: Postharvest (Broadleaf Herbicides)

Table of Contents

1. Introduction
2. Banvel II
3. 2,4-D Ester 600 or 2,4-D Ester 700
4. Preplant and Postharvest Weed Control Tables
   • Non-Selective Herbicides Available for Preplant Site Preparation (Table 6-1) (PDF - 41kb)
   • Preplant Herbicide Weed Control Ratings (Table 6-2) (PDF - 39kb)
   • Postharvest Weed Control (Table 6-3) (PDF - 38kb)
5. Other Special Methods of Weed Control
• Preplant-Site Preparation Prior To Any Crop
• Stale Seedbed and Inter-Row Weeding
• Postharvest Grass and Broadleaf Herbicides
• Spot Treatment with Hand-Held Equipment For Selective Weed Control
• Wick Wiper and Roller Application
• Seedbeds and Potting Soil: Soil Applied Fumigant
6. Related Links

Introduction

Leaf stage of the weeds is critical for good weed control. Smaller weeds are generally easier to kill but there needs to be enough leaf surface to intercept the herbicide. Apply according to recommended leaf stages. Crop stage is important to optimize crop safety. Adjuvants will frequently improve the weed control when used as directed. Weather or other conditions may influence the optimum rate of adjuvant, see the product label for more details. Always use appropriate drift management technology.

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Precautions

• Apply in the fall to actively growing vegetation at least 2 weeks prior to a killing frost.
• Do NOT apply before fall seeded crops.
• ONLY cereals, soybeans, field corn, sweet corn or white beans may be grown year after application.

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Precautions

• Apply in the fall at the time of rapid growth.
• Use the higher rate for legumes and perennial weeds.
• For best results apply to actively growing vegetation at least 2 weeks before a killing frost.
• Do NOT apply before fall wheat or barley.

Related Links

• Weeds in Ontario
• Integrated Pest Management (IPM)
• Pesticide Application and Safety
• Pesticide Companies and Agents
• OMAFRA Sprayer Calibration Calculator
• PMRA website
• OMAFRA Publication 505: Ontario Weeds
• OMAFRA Publication 75: Guide To Weed Control

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