Pest identification
What's eating my dendrobium orchid?
Mealybugs
Signs: White waxy fluff at nodes, in leaf sheaths, and along canes; honeydew and sticky residue; canes may shrivel prematurely.
Control: Swab with 70% isopropyl alcohol; apply neem oil or insecticidal soap to the whole plant; check every 7–10 days and retreat until clear.
Scale insects
Signs: Hard brown or tan bumps fixed on canes and leaf surfaces; yellowing of pseudobulbs; reduced vigour and sparse flowering.
Control: Scrape off physically; treat with horticultural oil spray; systemic imidacloprid drench for persistent infestations; isolate affected plants immediately.
Spider mites
Signs: Pale stippling across leaves; fine webbing on undersides; most severe in winter when indoor heating lowers humidity.
Control: Mist plant and raise ambient humidity; wipe leaves with damp cloth; apply miticide or diluted neem oil every 5–7 days until resolved.
Aphids
Signs: Soft green or black insects clustered on new growth and flower buds; distorted canes and sticky deposits.
Control: Blast off with a gentle water spray; apply insecticidal soap; introduce beneficial insects such as lacewing larvae if growing in a greenhouse.
Keep dendrobium orchid pest-free
Healthy plants resist pests best. Get the basics right:
Dendrobium orchid pests — FAQ
What is eating my dendrobium orchid?
Dendrobium orchids face threats from mealybugs, scale insects, and spider mites indoors. Mealybugs are the most frequently encountered pest, hiding in canes and leaf axils. Aphids may target buds and new canes. Thrips distort flowers. Maintaining good air circulation and quarantining new plants prevents most infestations.
How do I get rid of mealybugs on dendrobium orchid?
White waxy fluff at nodes, in leaf sheaths, and along canes; honeydew and sticky residue; canes may shrivel prematurely. Swab with 70% isopropyl alcohol; apply neem oil or insecticidal soap to the whole plant; check every 7–10 days and retreat until clear.
How do I get rid of scale insects on dendrobium orchid?
Hard brown or tan bumps fixed on canes and leaf surfaces; yellowing of pseudobulbs; reduced vigour and sparse flowering. Scrape off physically; treat with horticultural oil spray; systemic imidacloprid drench for persistent infestations; isolate affected plants immediately.
How do I get rid of spider mites on dendrobium orchid?
Pale stippling across leaves; fine webbing on undersides; most severe in winter when indoor heating lowers humidity. Mist plant and raise ambient humidity; wipe leaves with damp cloth; apply miticide or diluted neem oil every 5–7 days until resolved.
How do I get rid of aphids on dendrobium orchid?
Soft green or black insects clustered on new growth and flower buds; distorted canes and sticky deposits. Blast off with a gentle water spray; apply insecticidal soap; introduce beneficial insects such as lacewing larvae if growing in a greenhouse.