Fungicide safety for orchid use

[tolumnia]

First, this is a bit of a cross post, but I haven't gotten any feedback in the beginners section. Sorry.

There seems to be a lack of options for fungicide where I live this time of year. I tried to find copper but could not so I ended up with Spectracide immunox. The chemical in it is myclobutanil.
Has anyone used this on their orchids? If not and I decide to experiment does anyone have tips?

Thanks in advance.