Bad weather has brought many a farmer to the brink of disaster over the past decade.
Usage notes: used before a singular noun
many a (something)
Many. Always followed by a singular noun. Many a man has tried to vanquish the beast, but none have succeeded.
many a
Numerous ones, as in Many a little boy has wanted to become a fireman. This adjective is always used with a singular noun, a usage dating from about 1200. Also see many is the.