white mold on main stock

cheers all....but unfortunately i have seem to acquired some mold. i have the black mold, im pretty sure its sootty mold from all the rain i have around here. the black mold i cant stop at all, so i just cut the infected parts out....this i may be able to fix, i have a the product 'blue lightning' that i got from an indoor garden shop early this year because i thought i had mold before(was actually cutworms) and this stuff is an fungicide.....since the white mold is on the stock rather than the buds and only on a small portion of the plant(its spreading fast up though)i had the idea to just dab some on a cotton swab and swab the infected stock....will this contaminate the rest of my bud either from washoff?absorbtion through stock and sent through plant? etc..... this plant has a bout 1 week left maybe one and a half. anyways thanks for the help.