pest infestation aphids scale spider mites on Bonsai
Quick answer
If your Bonsai has pest infestation aphids scale spider mites, the most likely cause is: Indoor bonsai have soft foliage year-round and face greater pest pressure than outdoor bonsai which benefit from winter hardiness. Common pests include greenfly/blackfly (aphids), scale insects, spider mites, vine weevils, and woolly aphids — all sucking pests that transmit viruses and excrete honeydew promoting sooty mold.
Start here:
- 1. 1. Greenfly/blackfly: Spray immediately with insecticide; repeat every 3-4 days until eradicated. Check for curled leaves (virus transmission sign)
- 2. 2. Scale insects: Rub off with damp cloth dipped in methylated spirit. Spray with systemic insecticide — eradication requires multiple treatments
Why Bonsai gets pest infestation aphids scale spider mites
Indoor bonsai have soft foliage year-round and face greater pest pressure than outdoor bonsai which benefit from winter hardiness. Common pests include greenfly/blackfly (aphids), scale insects, spider mites, vine weevils, and woolly aphids — all sucking pests that transmit viruses and excrete honeydew promoting sooty mold.
How to reverse pest infestation aphids scale spider mites on Bonsai
- 1
1. Greenfly/blackfly: Spray immediately with insecticide; repeat every 3-4 days until eradicated. Check for curled leaves (virus transmission sign)
- 2
2. Scale insects: Rub off with damp cloth dipped in methylated spirit. Spray with systemic insecticide — eradication requires multiple treatments
- 3
3. Spider mites (juniper, cryptomeria, pines): Visible as tiny red specks on white paper under shaking foliage. Treat with dusting sulphur or lime-and-sulphur spray every 3 days for 9+ days
- 4
4. Vine weevil: Adult beetles chew leaf edges (visible notching); larvae eat roots causing sudden wilting with moist compost. Pick off beetles; drench soil with insecticide for larvae
- 5
5. Woolly aphids (beech, cotoneaster, pyracantha, hawthorn, pines): White cotton-like wax clusters on stems. Remove with damp cloth + methylated spirit; spray with insecticide
- 6
6. Prevention: Use fresh soil from 3ft+ depth at repotting; ensure good air circulation; remove fallen leaves daily; keep plants healthy through proper watering and feeding
Keep pest infestation aphids scale spider mites off this Bonsai
Isolate all new plants for 2 weeks before introducing to collection. Spray monthly with systemic insecticide and fungicide from early spring through late summer. Keep bonsai on raised staging to prevent soil pest invasion. Never use unknown chemical bottles.