Sticky Honeydew on Indoor Lemon and White “Sand” on Rieger Begonia

Lemon Tree Issue

A 3‑year‑old potted lemon in Massachusetts has sticky leaves and tiny brown spots underneath. Soapy water helps temporarily.

Diagnosis

Honeydew from scale or aphids. The sticky residue is insect excrement. Treat with insecticidal soap (e.g., Safer) sprayed thoroughly, especially leaf undersides. Repeat weekly.

Begonia Follow‑Up

White sand‑like grains on begonia leaves may be mineral deposits (from hard water) or spider mite stippling, not insects. Check with a lens: moving specks = mites; crystalline, non‑moving = minerals. Treat accordingly.