| As I understand it the sarong is the outer layer on a cattleya psb which usually dries up, turning brown and papery. It is usually loose and pests can indeed hide behind it. It can be peeled off for cosmetic and plant health reasons.
In this case if it is really stuck to the psb the only reason to remove it would be cosmetic as I assume no pests could get behind it. I would leave it alone.
It is not the same as the sheath which is where the flower buds develop. |