What's eating my spiritus sancti?

Philodendron spiritus-sancti is one of the rarest and most valuable aroids in cultivation. Thrips pose the gravest threat, permanently scarring irreplaceable new leaves before they fully open. Mealybugs and spider mites are secondary risks. Given its extreme rarity and value, strict quarantine protocols — never placing it near other plants — are non-negotiable.

Emerging elongated leaves develop silver streaking, bronze scarring, and distorted margins that cannot be reversed Keep the plant in strict isolation; inspect every 2–3 days; treat at first sign with spinosad spray every five days for four-plus cycles; use blue sticky traps as an early-warning system

Waxy white clusters at petiole bases and stem nodes; leaves lose vigour; severe infestations stall growth entirely Remove manually with an isopropyl alcohol swab; follow with neem oil spray weekly; never move the plant near other specimens when treating

Fine pale speckling across the long lance-shaped leaves; webbing on undersides in dry indoor air Maintain high humidity (60–70%); wipe leaves with a damp microfibre cloth; apply insecticidal soap or predatory mites (Phytoseiulus persimilis) if infestation is confirmed