Hi Michael,
I was just pondering the same question yesterday, when I did the initial drench on the plants with Excelurator. I've decided (without any scientific basis) to wait a week between treatment with the Great White myco.
As the Excelurator is derived from Ammonium Nitrate and Potassium Hydroxide, I was concerned about how these compounds would interact with the Great White mycos and beneficial bacteria. Maybe we have a Chemist here at TV who can enlighten us on the subject.
Raybo