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 |