When inspection reveals a botrytis/bud rot infection I immediately take the following steps;
a) Latex gloves, it just seems like a good precautionary measure to wear these while operating on a Botrytis site.
b) A dampened paper bag to contain the offending bud once its removed and its billions of spores. (Nothing like carrying an infected bud out of your garden in your bare hand while it showers your healthy babies with deadly spores.)
c) Dampened paper towel. I use these to cover over the healthy area immediate around the infection site to capture any dislodged spores while I am removing the infected bud.
d) Sharp Scissors washed in hot soapy water and dipped in alcohol. (I am not 100% sure if alcohol kills these spores but it seems a reasonable precautionary measure).
e) Once I have the above in place, I gently pull/bend the stem slightly so as minimize disturbing the offending bud, slide my scissors tight to the base of the stem and snip off the bad bud, it is gently put into the damp paper bag.
f) I than treat the infection site and associated stem area with a copper sulphate solution on a Q-TIP to help stop the Botrytis from literally crawling up or down the stem to the next buds.
Q-tip dipped in Copper Sulphate Solution to be applied to the stem and surrounding area after removal of the infected bud.
The paper bag with the offending bud(s) and the deadly brood of spores is carried far away from the garden and if not burned placed in a trash bag.
h) After each infection removal WASH! Clean your tools and your hands.
i) It is imperative to monitor the cleansed site every day to monitor the overall health of the area and of course the surrounding buds for any contact infection. (The yarn trick works very well to keep track of these sites)
Increase your airflow in and around your girls, this includes:
a. Some gentle LST (low stress training), by opening up your plant as it grows with ties and strings creating greater air gaps between adjacent plants, stems and branches. The more air flow the better, it helps to control bud rots friends (humidity & dampness). As a side benefit a stem trained even slightly horizontal, IMHO, produces a greater quantity of larger nugs than a vertical stem. Additionally the nugs grow upwards and away from the stem therefore eliminating the nasty crotch area where lack of airflow and moisture tends to live.
Later on when the buds are larger I have actually gently inserted large wooden tooth picks/straws between the stem and the bud creating a small air
Trim and clean the foliage under the plant specifically taking off non-productive stems and yellowing leaves. Open the airflow below your plant. Constantly clean out any weeds and dead debris under your girls where Botrytis can continue to live as a mycelium.
After a rain shake the plant from the bottom, give it a good shake to get excess moisture away from your buds, also never water from the top, if you wanna spray your leaves use a bottle sprayer, if you get a lot of dew in the am
Shake your moneymaker again.
Hope that helps