Weeds in Ontario

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What's New in Weeds?

• Giant Hogweed in Ontario
• Ontarioweeds.com - Weed identification and management database
• Weed Pro 75 - herbicide selector for field corn

Most Popular Resources:

• Problem Weed Control in Field Crops
• Weeds Act - Frequently Asked Questions
• Milkweed Species in Ontario
• Responsible Glyphosate Use in Field Crops
• Weed Profile - Chess, Bromus secalinus L.
• Ontarioweeds.com - Weed identification and management database
• Ontario Weeds - Weed Gallery
• Publication 75, Guide to Weed Control
• Weed Pro 75 - herbicide selector for field corn
• Heat and Herbicides: Managing Post-emergent Applications in Corn
• Re-Spraying Failed Herbicides
• Red Clover tolerance to Winter Wheat Herbicides
• Resistant Weeds in Ontario

Articles - Field Crops

• Can I Apply Post-Emergent Herbicides to Soybeans Before the 1st Trifoliate Stage? (Crop Pest, June 2008)
• Is There Value in Using Residual Herbicides in Roundup Ready Corn? (Crop Pest, May 2008)
• Could it Get any Worse? (Crop Pest, May 2008)
• Mouse-Eared Chickweed Control with Cereal (Crop Pest, May 2008)
• Field Violet Control with Cereal Herbicides (Crop Pest, May 2008)
• Wild Carrot Control with Cereal Herbicides (Crop Pest, May 2008)
• Chickweed Control with Cereal Herbicides (Crop Pest, May 2008)
• Fowl Meadow Grass (Poa Palustris) Control in an Established Alfalfa and Timothy Crop (Crop Talk, March 2008)
• Soybean Crop Staging and Herbicide Application Timing (Crop Pest, June 2007)
• Winter Wheat Scouting Update as of May 24, 2007 (Crop Pest, May 2007)
• Impact - A new Corn Herbicide for Ontario (Crop Pest, May 2007)
• Patience with Perennial Weeds (Hort Matters, May 2007)
• Option 1, 2, 3 - A New "One-Pass" Corn Herbicide for Ontario (Crop Pest, May 2007)
• "Weird Weeds" Questions and Answers (Crop Pest, May 2007)
• Jimsonweed - An Emerging Problem In Field Crops? (Crop Talk, March 2007)
• Weed Seeds and Manure (Crop Talk, November 2006)
• Dog Strangling Vine – Results From 2006 (Crop Talk, September 2006)
• Dog Strangling Vine - An Invasive Species Creeping Into Agricultural Fields (Crop Talk, March 2006)
• Glyphosate Additives on Soybeans (Crop Talk, March 2006)
• Weed Control Considerations in Corn (Crop Pest, May 2006)

For previous articles see Index of Newsletter Articles on Weed Management - Field Crops

Articles - Horticultural Crops

• Time to Spot Treat Perennial Weeds (Hort Matters, June 2008)
• Helping Graminicides Work (Hort Matters, June 2008)
• Herbicide Injury - What Should I Do Now? (Hort Matters, June 2008)
• New Year's Resolutions for Managing Weeds (Hort Matters, January 2008)
• Reducing Common Groundsel in Strawberry Fields (Ontario Berry Grower, October 2007)
• Reducing Weeds in Berry Crops: Part 4 (Ontario Berry Grower, September 2007)
• Ready with Your Weed Prevention Program? (Hort Matters, May 2007)
• Patience with Perennial Weeds (Hort Matters, May 2007)
• Why Improve Weed Management in Young Trees? (Orchard Network, April 2007)
• Part 2: Improving Weed Management in Young Trees (Preplant/early spring) (TFGV, March 2007)
• Part 1: Why Improve Weed Management in Young Trees and Vines? (TFGV, March 2007)
• Reducing Weeds in Berry Crops (Ontario Berry Grower, March 2007)
• Plants You Don't Want to Touch! (Hort Matters, August 2006)
• Start Controlling Next Year's Weeds with Cover Crops (Hort Matters, July 2006)
• Herbicide Injury - What Should I Do Now? (Hort Matters, June 2006)
• Sources of Spot Treatment Equipment (Hort Matters, June 2006)
• Why is field pansy a problem in strawberries? (Hort Matters, April 2006)
• Rosettes in Your Rosaceae? (Hort Matters, April 2006)
• Herbicide Injury in Fruit Trees and Grapevines (TFGV, May 2006)
• Minor Use Registrations: What is third party liability? (Ontario Berry Grower, March 2006)

For previous articles see Index of Newsletter Articles on Weed Management - Horticultural Crops

New Herbicide Registrations for Ontario

• New Herbicides for Field Crops
• New Herbicides for Fruit Crops
• New Herbicides for Vegetable Crops
• New Herbicides for Specialty Crops

New Weed Publications

• Problem Weed Control in Field Crops
• Publication 75, Guide to Weed Control
• OMAFRA Crop Publications
• OMAFRA Field Pocket Guide - A Practical Tool To Record Crop Management Activities
• Prickly Lettuce (Order No. 03-041)
• Strawberry Weed Management - New Brunswick Strawberry IPM Guide (link to PDF - 319 k)
• Wild Mustard (Order No. 03-043)

Factsheets, Infosheets & Publications

| What's New In Weeds? | Weed Biology | Field Crops | Horticultural Crops |

Weed Biology

• Annual Broadleaves
  • Annual Nightshades (Order No. 94-075)
  • Bedstraw - Weed Control - Be On The Lookout For "Smooth Bedstraw"
  • Canada Fleabane (Order No. 02-067)
  • Cocklebur (Order No. 01-005) (PDF file - 2.82MB)
  • Coltsfoot
  • Jimsonweed - An Emerging Problem In Field Crops? (Crop Talk, March 2007)
  • Pigweeds (Redroot, Green and Smooth) (Order No. 01-009) (PDF file - 2.29MB)
  • Prickly Lettuce (Order No. 03-041)
  • Wild Mustard (Order No. 03-043)
• Grasses
  • Proso Millet (Order No. 87-025)
  • Quackgrass
  • Rough Bluegrass (Order No. 92-054)
• Herbicide Resistant Weeds (Order No. 01-023) (PDF file - 141KB)
• Newletter Article Index: Weed Biology
  • Annual Broadleaf Weeds
  • Annual Grassy Weeds
  • Perennial Weeds
• Ontario Noxious Weeds
  • Weeds Act - Frequently Asked Questions
  • OMAFRA Poisonous Plant Quiz
  • Ontario Noxious Weeds: Weed Profile
• Perennial Weeds
  • Dog Strangling Vine – Results From 2006 (Crop Talk, September 2006)
  • Dog Strangling Vine - An Invasive Species Creeping Into Agricultural Fields (Crop Talk, March 2006)
  • Field Bindweed (Order No. 01-007) PDF (PDF file - 2.89MB)
  • Jerusalem Artichoke (Order No. 94-077)
  • Milkweed Species in Ontario
  • Patience with Perennial Weeds (Hort Matters, May 2007)
  • Quackgrass
  • The Perennial Ground Cherries
• Weeds in Ontario
  • Ontario Weeds (Publication 505)
  • Ontario Weeds - Weed Gallery
  • Weed Identification Quiz
• Problem Weed Series:
  • Problem Weed Control in Field Crops
  • Problem Weed Series for Apples: Common chickweed (Orchard Network, February 2004)
  • Problem Weed Series for Tender Fruit & Grapes: Common chickweed (Tender Fruit Grapevine, January 2004)
  • Common Chickweed (Stellaria media) (Crop Talk, November 2004)
  • Eastern Black Nightshade: "Biology and Management" (Crop Pest, May 2005)
  • Herbicide resistance Eastern Black Nightshades are a problem, but solutions are in sight.(Crop Pest, June 2005)
  • Resistance to Group 2 Herbicides in Foxtails in Ontario (Crop Pest, June 2005)
  • Problem Weed of the Month: Hairy Galinsoga (Hort Matters, August 2004)
  • Problem Weed of the Month: Garlic Mustard (Hort Matters, May 2005)
  • Problem Weed of the Month: Common Mallow (Hort Matters, October 2004)
  • Problem Weed of the Month: Proso Millet (Hort Matters, August 2004)
  • Problem Weed Series for Orchard & Vineyards - Quackgrass (Hort Matters, January 2005)
  • Problem Weed of the Month: Poison Ivy (Hort Matters, August 2005)
  • Problem Weeds in Strawberries (Hort Matters, August 2005)
• Poisonous Plants
  • Common Weeds Poisonous to Grazing Livestock
  • Plants You Don't Want to Touch! (Hort Matters, August 2006)
  • Poison Ivy (Order No. 99-015)
  • Problem Weed of the Month: Poison Ivy (Hort Matters, August 2005)
  • Poisoning of Horses by Plants
  • Poisoning of Livestock by Plants (Order No. 87-016)
• Resources for Weed Management - A Listing of Books, Videos, Software & Courses

Weed Management in Field Crops

• What's New In Weeds?
• Application Technology
  • Sprayer Calibration Calculator
• Basics of Weed Management
  • Publication 75, Guide to Weed Control
  • Weed Control Glossary
  • Use of Chemicals to Control Weeds
    • Notes on Herbicides
    • Notes on Adjuvants
    • Materials, Mixtures and Mixing of Herbicides
    • Precautions with Pesticides
    • Determining Amount of Herbicides Needed
    • Applying Herbicides
    • Sprayer Application Record
    • Herbicide Companies and Agencies
  • Managing Weeds in Conservation Tillage
  • Managing Weed Resistance to Herbicides
  • Principles of Integrated Weed Management
• Beans
  • Publication 75, Guide to Weed Control
    • Beans
    • Beans (Dry, Snap and Lima) Herbicide Weed Control Ratings (Table 7-1) (PDF file - 92k)
  • Managing Weed Series: from Agronomy Guide for Field Crops
    • Crop Yield Losses Due to Weeds
• Cereals
  • Publication 75, Guide to Weed Control
    • Cereals
    • Cereal Herbicide Weed Control Ratings (Table 8-1) (PDF file - 122k)
• Managing Weed Series: from Agronomy Guide for Field Crops
  • Crop Yield Losses Due to Weeds
• Corn
  • Publication 75, Guide to Weed Control
    • Corn
    • Additional Weed Control Ratings for Corn (Field, Seed and Sweet): Grasses (Table 9-1) (PDF - 214k)
    • Corn Soil Applied Tank-mixes (Table 9-2) (PDF 70k)
    • Registered "Two-Way" Soil Applied Herbicide Tank-Mixes in Corn (Table 9-3) (PDF file - 87k)
    • Registered "Two-Way" Postemergence Herbicide Tank-Mixes in Corn (Table 9-4) (PDF file - 51k)
    • Maximum Weed Leaf Stages (or Height) for Postemergence Herbicide Application in Corn (Table 9-5) (PDF file - 81k)
  • Managing Weed Series: from Agronomy Guide for Field Crops
    • Crop Yield Losses Due to Weeds
• Forages
  • Publication 75, Guide to Weed Control
    • Forage Crops
    • Forage Herbicide Weed Control Ratings (Table 10-1) (PDF file - 62k)
    • Weed Response to Various Foliage Sprays (Table 18-2) (PDF file - 62k)
  • Managing Weed Series: from Agronomy Guide for Field Crops
    • Crop Yield Losses Due to Weeds
  • Weed Control in Horse Pastures
  • Weed Control - Be On The Lookout For "Smooth Bedstraw"
• Herbicide Information - Chemical Weed Control Products Used in Ontario:
  • Notes on Herbicides and Adjuvants
    • Adjuvants Used in Ontario (Table 5-1) (PDF file - 25k)
    • Herbicides Used In Ontario (Table 4-1) (PDF file - 207k)
    • Non Selective Herbicides Available for Preplant Site Preparation (Table 6-1) (PDF file - 41k)
  • Herbicide Groupings for Ontario (Table 4-5) (PDF file - 23k)
  • Herbicide Interval Before Rainfall Table (Postemergent) (Table 4-6) (PDF file - 45k)
  • Herbicide Companies and Agencies
  • Herbicide-Crop Rotation and Soil pH Restrictions (Field Crops) (Table 4-3) (PDF file - 80k)
  • Herbicide Injury Image Gallery
    • Crop Yield Losses Due to Weeds
  • Herbicide Mode of Action Categories (Order No. 00-061)
  • Herbicide Resistant Weeds (Order No. 01-023)
• Integrated Weed Management
  • Principles of Integrated Weed Management
  • Managing Weeds Series: Agronomy Guide
    • Field Scouting
      • Field Record Form
      • Field Scouting Form
  • Non Selective Herbicides Available for Preplant Site Preparation (Table 6-1) (PDF file - 41k)
  • Preplant Herbicide Weed Control Ratings (Table 6-2) (PDF file - 39k)
  • Postharvest Weed Control Ratings (Table 6-3) (PDF file - 38k)
• Newletter Article Index: Field Crops
  • Field Crops
  • Other Information
  • Application Technology
• Other Field Crops
  • Publication 75, Guide to Weed Control
    • Other Field Crops
    • Canola, Flax, Mustard, Sunflowers Herbicide Weed Control Ratings (Table 12-1) (PDF - 93k)
  • Managing Weed Series: from Agronomy Guide for Field Crops
    • Crop Yield Losses Due to Weeds
• Resources for Weed Management - A Listing of Books, Videos, Software & Courses
• Soybeans
  • Publication 75, Guide to Weed Control
    • Soybeans
    • Soybean Herbicide Weed Control Ratings (Table 11-1) (PDF file - 124k)
    • Weed Control Ratings for Soybeans (Table 11-2) (PDF file - 84k)
    • Soil Applied Two-Herbicide Tank-Mixes for Soybean (Table 11-3) (PDF file - 59k)
    • Registered Postemergence Two-Herbicide Tank-Mixes for Soybeans (Table 11-4) (PDF file - 83k)
    • Maximum Weed Stage for Postemergence Soybean Herbicide (PDF 78k)
  • Managing Weed Series: from Agronomy Guide for Field Crops
    • Crop Yield Losses Due to Weeds

Weed Management in Horticultural Crops

• What's New In Weeds?
• Application Technology
  • Sprayer Calibration Calculator
• Basics of Weed Management
  • Publication 75, Guide to Weed Control
  • Weed Control Glossary
  • Use of Chemicals to Control Weeds
    • Notes on Herbicides
    • Notes on Adjuvants
    • Materials, Mixtures and Mixing of Herbicides
    • Determining Amount of Herbicides Needed
    • Precautions with Pesticides
      • Pesticide Regulations
    • Sprayer Application Record
    • Herbicide Companies and Agencies
  • Managing Weeds in Conservation Tillage
  • Managing Weed Resistance to Herbicides
  • Principles of Integrated Weed Management
• Fruit Crops
  • Publication 75, Guide to Weed Control
    • Berries
    • Tree Fruit & Grapes
  • Herbicide Weed Control Ratings for Fruit Crops (Table 15-1) (PDF file - 110k)
    • Tree Fruits
    • Cane and Bush Berries
    • Grapes
  • Strawberry Herbicide Weed Control Ratings (Table 14-1) (PDF file - 64k)
  • Strawberry Weed Management - New Brunswick Strawberry IPM Guide (link to PDF - 319 k)
  • Newsletter Article Index: Fruit Crops
  • Planning Your Weed Management Strategy for Orchards and Vineyards (Tender Fruit Grapevine, March 2004)
• Herbicide Information - Chemical Weed Control Products Used in Ontario:
  • Notes on Herbicides and Adjuvants
    • Adjuvants Used in Ontario (Table 5-1) (PDF file - 25k)
    • Herbicides Used In Ontario (Table 4-1) (PDF file - 207k)
    • Non Selective Herbicides Available for Preplant Site Preparation (Table 6-1) (PDF file - 41k)
  • Herbicide Groupings for Ontario (Table 4-5) (PDF file - 23k)
  • Herbicide Interval Before Rainfall Table (Postemergent) (Table 4-6) (PDF file - 45k)
  • Herbicide Companies and Agencies
  • Herbicide-Crop Rotation and Soil pH Restrictions (Hort Crops) (Table 4-4) (PDF file- 82k)
  • Herbicide Injury Image Gallery
    • Apples
    • Blueberries
    • Raspberries
    • Strawberries
  • Herbicide Mode of Action Categories (Order No. 00-061)
  • Herbicide Resistant Weeds (Order No. 01-023)
• Integrated Weed Management
  • Principles of Integrated Weed Management
  • Managing Weeds Series: Agronomy Guide
    • Field Scouting
      • Field Record Form
      • Field Scouting Form
  • Non Selective Herbicides Available for Preplant Site Preparation (Table 6-1) (PDF file - 41k)
  • Preplant Herbicide Weed Control Ratings (Table 6-2) (PDF file - 39k)
  • Postharvest Weed Control Ratings (Table 6-3) (PDF file - 38k)
• Newsletter Article Index:
  • Fruit Crops
  • Vegetable Crops
  • Specialty Crops
  • Other Information
• Ornamentals
  • Publication 75, Guide to Weed Control
    • Nursery Crops
    • Turfgrass
    • Nursery Herbicide Weed Control Ratings (Table 16-1) (PDF file - 63k)
    • Turfgrass Herbicide Weed Control Ratings (Table 17-1) (PDF file - 66k)
  • Newsletter Article Index: Specialty Crops
  • Managing Weeds Series: from Pub. 811. Agronomy Guide
    • Crop Yield Losses Due to Weeds (for cut flower crop)
• Roadsides and Rights-of-Way
  • Publication 75, Guide to Weed Control
    • Roadsides and Rights-of-Way
    • Aquatic Weed Control
    • Susceptibility of Woody Plants to Various Herbicides and Mixtures as Foliage Sprays (Table 18-1) (PDF file - 51k)
    • Weed Response to Various Foliage Sprays (Table 18-2) (PDF file - 62k)
    • Habitats and Herbicide Susceptibility of Common Aquatic Plants (Table 19-1) (PDF file - 80k)
• Resources for Weed Management - A Listing of Books, Videos, Software & Courses
• Vegetables
  • Publication 75, Guide to Weed Control
  • Weed Management in Carrots (Order No 09-045w)
    • Herbicide Weed Control Ratings for Corn (Field and Sweet) (Table 9-1) (PDF file - 214k)
    • Vegetable Herbicide Weed Control Ratings (Table 13-1) (PDF file - 86k)
  • Newsletter Article Index: Vegetable Crops
  • Managing Weeds Series: from Pub. 811, Agronomy Guide
    • Crop Yield Losses Due to Weeds

Application Technology

• What's New In Weeds?
  • Improving Spray Application And Reducing Spray Drift With Farm Windbreaks (Hort Matters, May 2005)
• Publication 75, Guide to Weed Control
  • Application Technology
    • Introduction
    • Care and Use of Equipment
    • Sprayer Calibration
    • Determining the Amount of Herbicides Needed
    • Materials, Mixing and Mixtures
    • Air-Blast or Mist Sprayers
      • Guide to Spraying Fruit Trees
    • Sprayer Calibration
      • Field Sprayer and Hand/Backpack Sprayer Calibration (Interactive)
      • Airblast Sprayer Calibration
    • Spraying Application Record
    • Wiper Applicators for Selective Weed Control
    • Care and Use of Equipment
    • Pesticide Drift
• Field Sprayer Calibration (Order No. 88-129)
• Newletter Article Index: Application Technology
  • Calibration
  • Nozzles
  • Spraying Techniques
  • Drift Reduction
• OMAFRA Sprayer Calibration Calculator - Field and Backpack Sprayers
• Pesticide Contamination of Farm Water Supplies (Order No. 00-099)
• Pesticide Storage, Handling and Application (Best Management Practices) (Order No. BMP13)
• Precautions With All Pesticides
• Reducing Pesticide Drift And Crop Damage (Order No. 88-118)
• Resources for Weed Management - A Listing of Books, Videos, Software & Courses
• Spot Treatments for Herbicides (Hort Matters, August 2005)
• Ways To Avoid Pesticide Spills (Order No. 96-025)

Newsletters

• Other Newsletters Online (external link list)
• OMAFRA Newsletters
  • Crop-Pest Ontario
  • Crop Talk
  • Grower Notes - The Ontario Floriculture Update
  • Hort Matters
  • Ontario Berry Grower
  • Orchard Network
  • The Tender Fruit Grapevine
  • Vegetable Viewpoint

Resources & Services

• Agriphone Numbers
• Agriculture Development Branch Staff Directory
• Herbicide Companies and Agencies
• Laboratories for Leaf Analysis
• Laboratories Accredited for Soil Testing
• Ontario Noxious Weeds
• Pest Diagnostic Clinic
• Resources for Weed Management - A Listing of Books, Videos, Software & Courses
• Sources of Crop Inputs
  • Air Induction Nozzle Manufacturers/Suppliers
  • Cover Crop Seed Suppliers
  • Plasticulture Suppliers
  • Pest Monitoring Equipment Suppliers (Partial List)
  • Safety Supply Companies in Ontario Providing Protective Clothing or Equipment
  • Sources of Agricultural Limestone For Ontario
  • Sources of Nursery and Landscape Supplies / Service

Stats & Facts

• Ontario Field Crops Statistics
• Ontario Horticultural Crop Statistics
• Overview Of Canadian Horticultural Industry
• Ontario Weed Committee

Crops Updates

• Ontario Field Crop Report
• National Crop Conditions Report
• Sound Advice - Audio Crop Updates
• What's Hot?- Weeds
• Crop and Pest Updates
  • Subscribe to OMAFRA Podcasts
  • Subscribe to Agriphone Messages

   

Insects, Diseases & Weeds

• Insect Factsheets & Infosheets
• Disease Factsheets & Infosheets
• Weed Factsheets & Infosheets
• OMAFRA Weed Identification Quiz
• OMAFRA Poisonous Plant Quiz
• OMAFRA Sprayer Calibration Calculator
• Ontario Noxious Weeds
• Crop Updates and Agriphone Messages
• Pesticide Information

Links

• Ontario Noxious Weeds
• Weed Links

  Related Topics

Weed Information Crops Updates Factsheets, Infosheets & Publications Labs for Soil Analysis Pest Diagnostic Clinic OMAFRA Newsletters Ontario Weed Committee Related Newsletters Sources of Crop Inputs Sprayer Calibration Calculator Weed Identification Quiz Poisonous Plant Quiz Weed Links

Other Crop Features Crop and Pest Updates Conferences & Meetings Crop Advisory Staff Crops Links Pest Updates Resources & Services Stats & Facts What's Hot

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