What's eating my scarlet drymonia?

Drymonia coccinea is a vining Amazonian gesneriad grown as a tropical houseplant. Its trailing habit and semi-epiphytic roots make it prone to mealybugs at stem joints and to spider mites in dry conditions. Fungus gnats can breed in organic-rich bark mixes. Regular inspection of the entire vine length is essential to catch early infestations.

Fluffy white deposits at the many leaf axils and vine nodes along the trailing stems; heavy infestations cause general yellowing and dieback of shoot tips Treat each colony with isopropyl alcohol on a swab; follow up with a full neem oil spray over the whole vine; cut back badly affected stems and dispose of debris

Yellow stippling on leaves across the length of the vine; fine webbing in the stem-leaf junctions; leaves may dry out and drop in severe cases Increase humidity; shower the vine with tepid water to dislodge mites; apply insecticidal soap or neem oil spray to both leaf surfaces; repeat weekly

Adult gnats hovering around the moist bark or coir growing mix; larvae eat fine roots and organic material, causing wilting or patchy growth Allow the top layer of the mix to dry between waterings; use yellow sticky traps; apply a Bti (Bacillus thuringiensis israelensis) drench to the substrate to kill larvae