Pests plant guides

Spider mites, thrips, mealybugs, scale insects, aphids, whiteflies, and fungus gnats are common indoors. Inspect leaf undersides, new growth, stem joints, soil surfaces, and nearby plants because each pest leaves different insects, webbing, residue, damage patterns, or flying adults.

Isolate the plant, identify the pest, inspect neighboring plants, and remove heavily infested or dead material. Rinse or wipe the plant when appropriate, then choose a treatment labeled for that pest and plant; do not spray a drought-stressed plant or assume every insect needs pesticide.

Keep it separated through repeated inspections and at least one full treatment cycle, which varies by pest and product. Eggs and immature stages can survive the first treatment, so follow the label’s retreatment interval and wait until inspections remain clear before returning the plant.

No single product controls every pest or life stage. Neem-based products may suppress some soft-bodied insects when correctly labeled and applied, but coverage, repeat timing, plant sensitivity, and pest identification determine whether they work.

Reinfestation often comes from missed eggs, untreated nearby plants, incomplete spray coverage, a treatment interval that does not match the pest’s life cycle, or new plants brought indoors. Monitor with close inspection or sticky cards and combine sanitation, isolation, physical removal, and targeted treatment.

Adult fungus gnats are mainly a nuisance, but larvae feed in moist organic media and can damage fine roots, especially on seedlings and young plants. Letting the surface dry appropriately, correcting chronically wet conditions, and using a labeled larval control are more effective than killing adults alone.