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Pests
Scale Insects on Orchids
Commonly affects: Phalaenopsis spp. and other Orchidaceae (Orchid)
Small, immobile brown or tan bumps attach to leaves and stems, secreting honeydew and weakening the plant over time.
Potential Causes
- 1Scale insects establishing on leaf undersides and stems
- 2Introduction from a nearby infested plant
- 3Stressed or crowded plants being more susceptible
Solution Steps
- 1Scrape off visible scale by hand or with a soft brush for light infestations
- 2Apply horticultural oil or insecticidal soap, covering both leaf surfaces thoroughly
- 3Isolate the affected plant from other orchids until cleared
- 4Repeat treatment every 1-2 weeks for several cycles, since scale's protective coating makes it resilient
Prevention Tip
Inspect new orchids carefully before placing them near your existing collection, since scale often arrives on new plants.
