Pest Infestation: Causes, Diagnosis & Fixes
Common houseplant pests include spider mites, mealybugs, fungus gnats, scale, and aphids. Early detection makes management easier.
Quick diagnosis
Regular inspection is the best prevention. Catching pests early makes them much easier to manage.
Possible Causes
Spider Mites
Why: Thrive in dry, warm conditions. Very small and often go unnoticed until damage is visible.
Signs to check: Fine webbing on leaves, tiny dots on leaf undersides, stippled or speckled leaves.
Mealybugs
Why: Sap-sucking insects that produce a white, cottony substance.
Signs to check: White fluffy clusters on stems, leaf joints, or undersides.
Fungus Gnats
Why: Larvae thrive in consistently moist soil.
Signs to check: Small flying insects around soil surface, especially when watering.
What to Check
- 1Inspect leaf undersides with a magnifying glass
- 2Check stem joints and new growth areas
- 3Look for webbing, sticky residue, or white fluff
- 4Note any small flying insects around the soil
What You Can Do
- Isolate affected plant from other plants
- Wipe leaves with a damp cloth for minor infestations
- Allow soil to dry between waterings for fungus gnats
- Consider neem oil or insecticidal soap for persistent issues
When to Seek Help
- Infestation spreading to other plants
- Severe leaf damage or leaf drop
- Plant showing overall decline despite treatment
Key Takeaway
Regular inspection is the best prevention. Catching pests early makes them much easier to manage.
Frequently asked questions
What causes pest infestation in houseplants?
Common houseplant pests include spider mites, mealybugs, fungus gnats, scale, and aphids. Early detection makes management easier. Common causes include spider mites, mealybugs, fungus gnats.
How do I fix pest infestation?
Start by identifying the likely cause instead of applying every remedy at once. Isolate affected plant from other plants Wipe leaves with a damp cloth for minor infestations Allow soil to dry between waterings for fungus gnats
Track the problem over time
Track recovery in the app
Log photos, notes, care history, and reminders while you monitor changes.
Sources and review
Content last reviewed: September 4, 2026
Content compiled from publicly available horticultural references for educational purposes. Source organizations are listed for transparency only and do not imply endorsement.