What's eating my bulbophyllum elizabeth ann?

Bulbophyllum 'Elizabeth Ann' is a hybrid orchid grown in warm humid indoor or greenhouse conditions. Spider mites thrive if humidity drops below its preferred level. Mealybugs hide readily between the closely spaced pseudobulbs. Fungus gnats can attack roots in overly moist bark mix. High humidity and good drainage address most threats.

Silvery stippling across leaf surfaces and fine webbing; accelerates dramatically if growing conditions dry out. Maintain high humidity above 60%, spray with insecticidal soap or neem oil, and repeat weekly for three weeks.

White waxy colonies between pseudobulbs and at root crowns; stunted new growth and honeydew deposits. Apply isopropyl alcohol with a cotton swab to each colony; follow with a neem oil drench to the root zone.

Larvae feed on fine root tips in constantly moist medium; adult flies hovering around the potting mix. Allow bark surface to dry slightly between waterings; use yellow sticky traps for adults and a Bacillus thuringiensis israelensis (Bti) drench for larvae.