| Is the flask unopened and the agar intact? If so you can keep it on a windowsill (no direct sun) until you want to deflask. If you notice contamination or the leaves starting to yellow or die back deflask immediately as the media may be exhausted. If the flask has been "padded" with water, shredded paper etc for shipping you'll need to deflask within the next few days.
As for fungicides, I'm not a fan of copper based fungicides for orchids but plenty of people use them. I would suspect they may be a little rough on seedlings. If you're going to use fungicides it's safer to use something milder and preferably systemic. There is a growing trend against the prophylactic use of fungicides when deflasking orchids. A lot of people (including several large tissue culture lab operators) recommend treating with fungicide only when you notice a problem as fungicides can be harmful to otherwise healthy plantlets. |