White hairlike fuzz (it's not mealybugs) on den canes

[MateoinLosAngeles]

Originally Posted by KatieM

I separated the dead canes, cleaned the good canes up and repotted it and it's already much happier. Sprayed a little peroxide but as y'all suggested I did not spray the physan.

I personally think that Physan is much more harmless and effective as a general disinfectant than peroxide. Drugstore hydrogen peroxide is really damaging to roots.

Have you looked at this Cinnamon DIY spray? Home Remedies › First Rays LLC

I've used it and works well for me for minor things such as those white fuzzies.

Now, your plant is a deciduous plant, which means it will drop its leafs and it's in a resting period. The sheaths are safe to remove if they're dry, it can arguably be recommended.

But I think the main thing here is that if you received a plant in poor condition, then repotted it, then repotted it again, it's just going from stressor to stressor which can really stifle its recovery. Finally, you can do more research on live moss, but being alive the moss will compete with the orchid for resources, further hampering its recovery. And also, won't live moss constantly stay wet or otherwise it will die too? My understanding is that most Dendrobiums will need some sort of dry rest at some point of the year. And I believe yours is one of them. How will you let it dry if the moss is alive? And if it's resting, how is it supposed to adapt to new potting media?

I think you should reconsider the culture of this plant.