A sticky substance on the leaves, window, or floor beneath your Stephanotis (Madagascar jasmine) is a telltale sign of sap‑sucking insects. The residue—often called honeydew—is excreted by scale, mealybugs, or aphids. The hard white crust where the vine meets the trellis is likely dried honeydew.
Use a magnifying glass to inspect the undersides of leaves and stem joints. Look for:
Spray the entire plant with 70% isopropyl alcohol every 3 days for up to 6 months. Continue until no insects are seen for a full month. Thorough coverage is critical.
Apply a systemic granule or liquid (e.g., Bonide Systemic Houseplant Insect Control) to the soil once. The plant absorbs it, poisoning pests for 4–6 months. Follow label directions exactly.
This root‑absorbed product protects against scale, mealybugs, and other insects for a full year. Apply according to the bottle’s instructions for your pot size. Available at home‑improvement stores for ~$20.
Whichever method you choose, early action prevents the infestation from spreading and keeps your Stephanotis healthy and blooming.
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