Part 1 of this experiment was last year, and that entailed harvesting the spores of a Huitlacoche inhabited corn cob.
In Part 2 I retrieve the liquefied corn smut from the freezer, dilute it in water, and inoculate the silk of my corn plants. I have wrapped the male flowers in plastic film to prevent pollination, which is said to impede the growth of the mycelium. I will post the results hopefully in a couple of weeks. This research says 16 or 17 days: Production and Marketing of Huitlacoche