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Table 4-5: Herbicide Groupings for Ontario

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

Pub 75: Guide to Weed Control > Notes on Herbicides > Table 4-5: Herbicide Groupings for Ontario

Excerpt from 2008 Chapter 4, Publication 75, Guide to Weed Control, Order this publication

Cover of Publication 75, Guide to Weed ControlTable of Contents

  1. Herbicide Groupings for Ontario (Table 4-5) (PDF - 23 kb)
  2. Herbicide Groupings For Pre-Mix and "Co-Pack" Products
  3. Other Tables on Herbicides and Adjuvants
    • Herbicides Used in Ontario (Table 4-1) (PDF - 207 kb)
    • Glyphosate Products and Their Registered Uses (Table 4-2) (PDF - 54 kb)
    • Herbicide Crop Rotation & Soil pH Restrictions (Field Crops) (Table 4-3) (PDF - 80 kb)
    • Herbicide Crop Rotation & Soil pH Restrictions (Horticultural Crops) (Table 4-4) (PDF - 82 kb)
    • Interval Before Rainfall (Postemergence) (Table 4-6) (PDF - 49 kb)
    • Adjuvants Used in Ontario (Table 5-1) (PDF 25 kb)
    • Adjuvant Rates per Sprayer Tank Water Volume (Table 5-2) (PDF 11 kb)
  4. Other topics on Notes on Herbicides and Adjuvants
  5. Related Links
Table 4-5: Herbicide Groupings for Ontario
Group1 Site of Action Single Modes of Action (alphabetic order) Confirmed herbicide resistant weeds in Ontario
1 Inhibitors of acetyl CoA carboxylase (ACCase) Acclaim Super, Achieve, Assure, Assure II, Excel Super, Poast Ultra, Puma120 Super, Select,Venture Currently none confirmed.
2 Inhibitors of acetolactate synthase (ALS) and also called acetohydroxyacid synthase (AHAS) Accent, Arsenal, Classic, Firstrate, Muster, Option 2.25 OD, Pinnacle, Prism, Pursuit, Refine Extra, Telar, Ultim, Upbeet Cocklebur, common ragweed, eastern black nightshade, giant foxtail, green foxtail, green pigweed, lamb's-quarters, redroot pigweed, waterhemp.
3 Microtuble assembly inhibitors Bonanza, Dacthal W-75, , Dimension, Prowl, Rival, Treflan Currently none confirmed.
4 Synthetic auxins 2,4-D, Banvel II, Caliber, Cobutox, Compitox, Clovitox Plus, Desormone, Diphenoprop, Dycleer, Dyvel, Embutox, Estaprop Plus, Garlon, IPCO Dichlorprop-D, IPCO Premium 2-Way XP Turf Herbicide, Killex, Lontrel, MCPA, Mecoprop, Mecocrop 2,4-D, Meco-D, Par III, IPCO Premium 3-Way XP Turf Herbicide, Release, Sword, Target, Topside, Tordon 101, Tricep, Turf-Rite 2+2, Turboprop, Vanquish, Weedone CB Wild carrot.
5 Inhibitors of photosynthesis at photosystem II, Site A Aatrex, Atrazine, Gesagard, Hyvar X, Princep, Pronone, Pyramin FL, Sencor, Simadex, Simazine, Sinbar, Spin-Aid, Velpar Barnyard grass, common groundsel, common ragweed, goosefoot, redroot pigweed, waterhemp, wild mustard, witch grass, yellow foxtail.
6 Inhibitors of photosynthesis at photosystem II, Site B Basagran, Basagran Forte, Koril, Pardner Green pigweed.
7 Inhibitors of photosynthesis at photosystem II, Site B (alternate binding site) Diurex 80W, Herbec, Karmex, Lorox Green pigweed, smooth pigweed.
8 Conjugation of acetyl co-enyme A Betasan, Eradicane, Eptam, Ro-neet Currently none confirmed.
9 Inhibitors of 5-enolpyruvylshikimimate-3-phosphate synthase (EPSP) Clear-it, Credit, Credit Plus, Expedite Grass and Weed, EZJect, Factor, Glyfos, Renegade, Roundup, Roundup WeatherMax, Sharpshooter, Sharpshooter Plus, Touchdown iQ , Touchdown Total, Vantage, Vantage Plus,Vantage Plus Max,Vision Currently none confirmed.
10 Inhibitors of glutamine synthetase Ignite, Liberty Currently none confirmed.
11 Inhibitors of carotenoid biosynthesis Amitrol Currently none confirmed.
13 Diterpene synthesis inhibitor Command 360 Currently none confirmed.
14 Inhibitors of protoporphyrinogen oxidase (Protox)

Aim EC, Blazer, Goal, Reflex, Ronstar

 Currently none confirmed.
15 Conjugation of acetyl co-enyme A Devrinol, Dual Magnum, Dual II Magnum, Frontier Currently none confirmed.
19 Inhibitors of auxin transport system Alanap Currently none confirmed.
20 Inhibits cell wall synthesis, Site A Casoron Currently none confirmed.
22 Photo system I - electron diverters Gramoxone, Reglone, Reward, Weed & Grass Killer Canada fleabane, field peppergrass.
23 Inhibitors of mitosis CIPC Currently none confirmed.
28 Inhibitors of p-hydroxyphenyl pyruvate dioxgenase (HPPD) Callisto, Converge Pro, Impact, Infinity Currently none confirmed.
  others Basamid, Krenite, Vapam  

1 - Herbicide groupings for Ontario follow the Weed Science Society of America's nationally accepted groupings. Groups 12, 13, 16, 17, 18, 21, 24, 25 and 26 are not available in Ontario
2 - Products with two or more sites of action are followed by the group numbers involved.
3 - Indicates herbicides sold as a co-pack under this trade name.

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Herbicide Groupings For Pre-Mix and "Co-Pack" Products
Premix or "Co-Pack" Trade Name
Component #1
(WSSA Group)
Component #2
(WSSA Group)
Component #3
(WSSA Group)
Accent 1-Pass3
Accent (2)
Accent Total3
Accent (2)
 
Battalion3
Boundary3
Sencor (5)
 
Broadstrike Dual Magnum
 
Buctril M, Badge or Mextrol
MCPA (4)
 
Cleansweep3
Pursuit (2)
 
Conquest3
Pursuit (2)
Sencor (5)
 
Converge Pro3
Converge 480 (5)
 
Distinct
 
Galaxy3
 
Guardian3
 
Infinity
 
Krovar
diuron (7)
 
Laddok
 
Marksman
 
Meridian Plus3
 
Peakplus3
 
Primextra II Magnum
 
Shotgun
 
Summit
 
Ultim Total3
Ultim (2)
 
Valor
 
Viper3
Viper (2)
Reflex (14)
 

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