Hoping someone can tell me what's happening so I can treat it. Happening to a handful of plants. I have not seen any bugs on the leaves or in roots. Repotted and treated with Azamax as a precaution. Leaves will sometimes be sticky prior to drying out completely. Help?
It looks like it had rot and the plant is desiccated. Unfortunately don’t hold much hope for a positive outcome with this. Look at the roots. You may find that they are in poor condition or now rotted away.
The media is too dry for Paphiopedilum as they need constant moisture in the media. Looks like the media you are using is more suited to epiphytes that need to dry out really quickly. I would use a smaller grade of bark and add sphagnum moss to the mix. Make sure you have at least 50% or more humidity in your growing area.
My humidity has been holding steady around 55%. A few points higher for a couple days after I water on Sundays. Going to look into getting a humidity tray to help it reach higher.
I repotted en masse this summer with Orchiata Power Classic mix for my smaller, compact paphs and Power Plus mix for all other pots 4" or greater. Didn't see too much root rot when I repotted, but I do struggle with occasional crown rot because I switched to a gallon pressure sprayer for watering and it occasionally blasts water everywhere unintentionally. Normally crown rot turns the plant to mush so the drying out leaf crispiness kind of threw me off.
Yes, I have heard it to be scale secretions, and in this case, that is the more likely source, but it is also sugary sap exuded by some plants when their stockpile of resources is quite good. I have read some folks’ speculation that it help attract pollinators.
I never saw any bugs with my eyes. I tried zooming in on pics I've taken to see if I could make out any insects and didn't find any.
Could it have been the act of repotting that upset them? Actually, I did a lot more than that. I repttted then relocated from under a window/skylight to a LED shelf setup with fans. Could I have introduced too much change at once?