Meyer Lemon Sticky Leaves: Honeydew from Sap-Feeding Insects

Indoor Meyer lemon (3 yrs) has shiny sticky leaves and "spitting" syrup. Two baby lemons dropped months ago.

Cause

Honeydew from aphids, whiteflies, scale, or leafhoppers. Insects suck sap, excrete sticky sugar.

Control

1. Wash leaves thoroughly (undersides too) to dislodge insects.
2. Inspect closely: use magnifier, shake over paper.
3. Treat with horticultural oil or insecticidal soap (garden center).
4. Repeat as needed.

Eliminating insects stops the stickiness.