Weed Management in Cranberries: Introduction

Introduction

• Cultural Weed Control - see Weed Management in Berry Crops: Introduction.
• Maintaining a healthy and vigorous crop will aid in weed control by avoiding openings in the bed for weed germination and establishment.
• Prevent weeds from setting seed on dikes and in adjacent uncropped areas by using cultural or chemical weed control measures. Mowing at regular intervals will prevent many weeds from setting seed. Seeding the dikes with a desirable grass cover will reduce the opportunities for weed establishment and will provide bank stabilization.
• Recommended rates /ha or /ac refer to area actually treated with herbicide.
• Site Preparation Before Planting - see Chapter 6, Special Methods of Weed Control
• Herbicide Application Timings:
  • Soil Applied Treatments include:
    • Preplant (PP) - Also see Chapter 6, Special Methods of Weed Control for details of products, rates and remarks.
    • Preemergence (PRE) - Rainfall of 15-20 mm within 7-10 days after application is necessary to activate preemergence treatments. Shallow cultivation, rotary hoeing or harrowing will control weed escapes and improves herbicide activity in the absence of rainfall.
  • Postemergence (POST) - 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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Related Links

• Weeds in Ontario
• Berries 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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