Herbicide Recommendations for Cucumbers: Postemergence Grass Herbicides

Table of Contents

1. Introduction
2. Poast Ultra + Merge
3. Venture L
4. Vegetable Herbicide Weed Control Ratings (Table 13-1) (PDF file - 86Kb)
   • Annual Grasses
   • Broadleaf Weeds
   • Perennial Weeds
5. Other Cucumber Weed Control Recommendations
• Preplant (Stale Seedbed Technique)
• Soil Applied Grass Herbicides
• Soil Applied Broadleaf Herbicides
• Soil Applied Grass and Broadleaf Herbicides
6. Related Links

Introduction

Postemergence - 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 to actively growing grasses.
• For annual grass, use 0.32 L/ha. Apply at the 1-6 leaf stage.
• For volunteer grains, use 0.47 L/ha.
• For quackgrass, use 1.1 L/ha. Apply up to the 3-leaf stage. Thorough preplant tillage will ensure more uniform quackgrass emergence. Cultivate after 7 days in wide row crops. Use the high rate of Merge for quackgrass.
• Use 100-200 L water/ha (40-80 L water/ac).
• Do NOT apply closer than 30 days to harvest.

Precautions

• Apply POST to actively growing grasses before tillering.
• Apply at 0.6 L/ha (0.24 L/ac) at 2-5 leaf stage of volunteer corn.
• Apply at 0.8 L/ha (0.32 L/ac) at 2-5 leaf stage of volunteer wheat and barley.
• Apply at 1 L/ha (0.4 L/ac) at 2-5 leaf stage of annual grasses (2-4 leaf for foxtails) .
• Apply at 2 L/ha ( 0.8 L/ac) at 3-5 leaf stage of quackgrass & wirestem muhly.
• Thorough preplant tillage, fragmenting quackgrass rhizome improves control.
• Do NOT cultivate between rows until 5 days after application.
• ONLY make one application per season.

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Related Links

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

   

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