Mystery Pests on Outdoor-to-Indoor Plants: Likely Spider Mites + Leafminers

Tiny worms with webbing and leaf tunnels suggest two pests: spider mites (webbing) and leafminers (tunnels, black frass). No single treatment covers both.

Dual Treatment Plan

1. Leafminers: Systemic insecticide (imidacloprid granules in soil or spray systemic).
2. Spider mites: Insecticidal soap or neem oil spray (chemicals often fail on mites).
3. Repot: Fresh soil—soil pests may have hitchhiked.

Homemade Soap Spray

Dawn dish soap (few drops) in distilled water. Spray thoroughly, especially undersides. Rinse after. Repeat every 5–7 days.

Commercial Options

• Neem oil: kills mites, antifungal, less toxic.
• Imidacloprid: systemic, good for leafminers.
• Always test-spray one leaf first.

Prevention

Quarantine new/outdoor plants 3–4 weeks. Monthly strong water spray washes off early arrivals.

Treat both pests simultaneously for clearance.