Where does spider mite appear on indoor plants? - briefly
Spider mites typically colonize the undersides of foliage, feeding on cell contents and producing fine webbing that may also be visible on leaf edges and stems. Infestations often begin on new growth where humidity is low and air circulation is limited.
Where does spider mite appear on indoor plants? - in detail
Spider mites colonize the most vulnerable parts of houseplants, concentrating on areas where moisture is low and foliage is dense.
The upper leaf surface is the primary habitat; tiny webs and stippled discoloration appear among the tiny leaf hairs (trichomes). The undersides of leaves also host mites, especially where air circulation is poor and dust accumulates, providing shelter and a food source.
New growth, such as tender shoots and emerging leaves, is frequently infested because the tissue is softer and richer in nutrients. Stems and petioles may support mite colonies when leaf clusters are tightly packed, creating micro‑environments with reduced airflow.
Reproductive structures—flower buds and fruiting bodies—can be attacked, leading to distorted blossoms and reduced fruit set. In plants with compound leaves, the junctions between leaflets often harbor mites, as the crevices retain humidity.
Typical infestation sites include:
- Upper leaf surfaces, especially near the midrib and vein network
- Lower leaf surfaces in shaded, dust‑laden zones
- Young shoots and newly unfurled leaves
- Stem and petiole junctions where foliage is dense
- Flower buds and developing fruits
- Leaflet junctions on compound foliage
Monitoring these specific locations enables early detection and timely control measures.