Scale Insects on spider plant
What's Happening
Armored scale insects (family Diaspididae) attach to spider plant stems and leaf veins, forming protective waxy coverings that shield them from desiccation and predators. These sessile pests pierce vascular tissue to feed on phloem sap, weakening the plant over weeks while excreting honeydew that promotes sooty mold growth. Low indoor humidity below 40% favors scale armor development.
How to Fix It
- 1
Isolate infested plant immediately to prevent crawler dispersal to collection
- 2
Manually remove adult scales using 70% isopropyl alcohol-dipped cotton swab or soft toothbrush with soapy water
- 3
Apply neem oil or horticultural oil spray thoroughly, ensuring coverage breaks down waxy protective coverings
- 4
For heavy infestations, use systemic insecticides containing imidacloprid as soil drench
- 5
Prune and discard severely infested plantlets and foliage to redirect plant energy
How to Prevent It
Inspect all new plants under magnification before purchase. Quarantine acquisitions for 2-4 weeks with weekly underside inspections. Maintain 50-60% humidity and bright indirect light to minimize plant stress. Ensure adequate spacing between plants for airflow.