What's eating my callus slipper orchid?

Callus Slipper Orchid shares the classic Paphiopedilum vulnerability to mealybugs hiding deep in its leaf rosette, scale insects on foliage, and fungus gnat larvae in wet medium. Its broad, dark-tessellated leaves can conceal early pest activity. Inspect the crown and leaf axils at every watering and keep the medium just barely moist.

White woolly deposits in leaf axils and the central crown; reduced vigour, leaf yellowing, and stunted new growth Apply 70% isopropyl alcohol with a fine cotton swab directly into crevices; follow with neem oil spray; repeat weekly for a month

Hard flat shields on both leaf surfaces; honeydew leads to black sooty mold; leaves yellow in heavy infestations Wipe off with an alcohol-dampened cloth; apply horticultural oil spray to all leaf surfaces; recheck after two weeks

Larvae chew fine roots in bark medium kept too wet; wilting and yellowing despite good light and feeding Let the medium dry slightly between waterings; treat with a Bti drench (e.g. Gnatrol); use yellow sticky traps to monitor adults