Jacqueline Cahoon wrote:
I was listening to NPR this morning in the car, a program called The
People's Pharmacy. They were discussing the pharmacological use of
cornmeal to treat fungal infections. The called who introduced the
topic mentioned that he also uses cornmeal worked into the soil
around
his roses to prevent blackspot. Has anyone heard of this before?


No. Why would it work?

Blackspot is spread by spores that overwinter on the plant as well as
in the ground.


J. Del Col