Is it recommended to spary for bud rot durting the process of drying? It would make the plants alot more moist..so..
I think you just answered your own question. Or to be plain, no. Any treatment should be done at least 1 full week before harvest.
If you have serious mold problems I would spray closer to harvest than a week but no later than like 2 days before you cut them.. and ya probly definitely not when they are drying...