What's eating my philodendron pteromischum?

Philodendron Pteromischum is a collector's climbing aroid kept indoors, where mealybugs are the most common pest, colonising nodes and new growth quickly. Spider mites can escalate fast on its leaves in heated, dry rooms. Good quarantine practice when acquiring new plants is the single most effective prevention for this rare species.

Waxy white colonies at nodes and leaf axils; honeydew, stunted growth, and leaf drop Swab all colonies with 70% isopropyl alcohol; treat whole plant with neem oil spray weekly

Pale stippling and fine webbing on leaf surfaces; worse in low-humidity heated rooms Mist foliage and raise humidity; apply neem oil or insecticidal soap spray every 5–7 days

Scarring and distortion on young emerging leaves; silvery patches and dark frass Apply spinosad-based spray every 5 days for 3 cycles; remove and dispose of affected new growth