Congress was regulating the interstate commerce of wheat. Are you concurring that this regulation was unconstitutional?
"..It does not speak of a power to regulate commerce that "concerns" more than one state, or even commerce between persons of the same state that somehow "concerns" other states..." The Original Meaning of the Commerce Clause
The meaning of "concern" in the context quoted is incidental. Nor does the original meaning of "commerce" extend to manufacturing, production, mining or agriculture.