Resistant weeds in Canada
The following are resistant weeds that are known to exist across the country
| Weed |
Group(s) |
| Ball mustard |
Group 2 |
| Chickweed |
Group 2 |
| Cleavers |
Group 2, Group 4 |
| Cow cockle |
Group 2 |
| Green foxtail |
Group 1, Group 3 |
| Hemp-nettle |
Group 2, Group 4 |
| Kochia |
Group 2, Group 9 |
| Narrow-leaved hawk's beard |
Group 2 |
| Shepherd's-purse |
Group 2 |
| Sow thistle |
Group 2 |
| Stinkweed |
Group 2 |
| Wild buckwheat |
Group 2 |
| Wild oats |
Group 1, Group 2, Group 8 |
Download
| Weed |
Group(s) |
| Chickweed |
Group 2 |
| Cleavers |
Group 2 |
| Green foxtail |
Group 1, Group 3 |
| Kochia |
Group 2, Group 9 |
| Lamb’s quarters |
Group 2 |
| Persian darnel |
Group 1 |
| Redroot pigweed |
Group 2 |
| Russian thistle |
Group 2 |
| Shepherd’s-purse |
Group 2 |
| Stinkweed |
Group 2 |
| Wild mustard |
Group 2 |
| Wild oat |
Group 1, Group 2, Group 8 |
Download
| Weed |
Group(s) |
| Chickweed |
Group 2 |
| Cleavers |
Group 2 |
| Green foxtail |
Group 1, Group 2, Group 3 |
| Hemp-nettle |
Group 2 |
| Kochia |
Group 2, Group 9 |
| Pale smartweed |
Group 2 |
| Powell amaranth |
Group 2 |
| Redroot pigweed |
Group 2 |
| Stinkweed |
Group 2 |
| Wild mustard |
Group 2, Group 4, Group 5 |
| Wild oat |
Group 1, Group 2, Group 8 |
Download
| Weed |
Group(s) |
| Wild carrot |
Group 4 |
| Common lamb's quarters |
Group 5 |
| Green pigweed (also known as Powell's amaranth), red root pigweed, common ragweed |
Group 5 |
| Barnyard grass, yellow foxtail, old witch grass |
Group 5 |
| Late flowering goosefoot, wild mustard, common groundsel |
Group 5 |
| Canada fleabane (also known as mare's-tail) |
Group 22 |
| Red root pigweed, green pigweed (also known as Powell's amaranth), Eastern black nightshade, ragweed |
Group 2 |
| Green pigweed (also known as Powell's amaranth) |
Group 7 |
