Since this begins blooming in middle August at the same time as does Ragweed, many people assume they are sensitive to Canada Goldenrod. But the books say no.
The Tiphid Wasp is one of the many insects that love Goldenrod
A rosetta gall caused by the G.R. Midge. This is how that insects passes on to another generation.
Canada Goldenrod in several stages of blooming.
This insect is so attracted to Canada Goldenrod it is called the Goldenrod Soldier Beetle. And it mates on the plant.