Are sulfur/pyrethrins based products safe to use on our orchids? I purchased an "insect, disease & mite control" from Bayer Advanced called Natria that is supposed to kill fungus, insects & mites, as well as help prevent black spot & rust, which I'm hoping is safe for use. I'm also wondering if it can be applied to their flowers & buds w/o damaging them.
Any help &/or information is greatly appreciated.