Botrytis? How bad is it and what do I do?

[BrassavolaStars]

Hello all,

I have been having some orchids bloom for me in the greenhouse this winter and some of them have small brown dots on the flowers. I believe this is Botrytis. How bad is this? Does it permanently impact the plant?

So I hear, it happens in colder conditions with mediocre air circulation. This would make sense for my issue as I have had cold temperatures and not amazing circulation as my heater-fan duo was out of order from June until just a few days ago.

What do I do? I read daconil was good to get rid of it somewhere. When do I spray? ASAP? Wait for flowering to be done?

Also, does that get rid of it for next season? I’m fine if I don’t get the best flowering one season but something permanent would upset me.