| The weeds that appear above the wheat canopy late in the season, such as ragweeds and Canada thistle, can often be easily controlled with a spring herbicide treatment. |
| The goldenrods, like the ragweeds, generally flower in late summer and fall. |
| Because goldenrods are common and conspicuous when ragweeds release pollen into the wind, they often have been blamed for allergies that are actually caused primarily by ragweeds. |
