Pocket BotanistCheck these first
- Look closely at the base of the leaves where they meet the stem.
- Check the undersides of the leaves for any fuzzy white spots.
- Feel the leaves to see if they have a sticky residue.
Likely causes
Mealybug Infestation
Most likelyHow to tell: You see white, fuzzy patches in the leaf axils or under the leaves. The leaves may also feel sticky to the touch.
What to do: Dip a cotton swab in rubbing alcohol and dab it directly onto the bugs to kill them on contact. Repeat this every few days until you no longer see any pests.
Scale Insects
PossibleHow to tell: Small, hard brown bumps appear on the leaves or stems that can be scraped off with a fingernail. These are armored insects that feed on the plant sap.
What to do: Scrape the bumps off carefully with a dull knife or your fingernail. Wipe the leaves down with a soft cloth dipped in mild soapy water to remove any remaining larvae.
When to worry
If the infestation is widespread and covering the entire plant, it can weaken the orchid significantly. Catching them early is key to a quick recovery.
Stopping it coming back
Inspect your orchid every time you water it to catch new pests before they spread. Keep new plants isolated for a few weeks before placing them near your other orchids.
Not sure which one it is? Photograph your moth orchid.
This page lists the usual causes. Pocket Botanist looks at your actual leaf and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
Questions people ask
- Will these bugs spread to my other plants?
- Yes, mealybugs can easily move to nearby plants. Isolate your orchid immediately if you spot any bugs.
- Should I use a heavy pesticide?
- Usually, rubbing alcohol is enough for moth orchids. Avoid harsh sprays as they can damage the delicate leaves.
More problems with Moth Orchid
This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.