Pest identification
What's eating my commutatum fern?
Scale insects
Signs: Brown shell-like bumps on stems and rhizomes; sticky residue; fronds discolour and drop
Control: Manually scrape or swab with alcohol; treat with horticultural oil or insecticidal soap; repeat every 10–14 days
Mealybugs
Signs: White woolly tufts at growth points and rhizome intersections; honeydew present
Control: Remove with an alcohol swab; apply diluted neem oil spray every 7 days for 4 weeks
Fungus gnats
Signs: Larvae damage shallow roots; adults swarm around the pot base; plant may show unexplained wilting
Control: Let the top layer of mix dry out; use yellow sticky traps; drench with Bti-based biological larvicide
Keep commutatum fern pest-free
Healthy plants resist pests best. Get the basics right:
Commutatum Fern pests — FAQ
What is eating my commutatum fern?
Commutatum Fern (Microsorum commutatum) is an epiphytic houseplant that most commonly suffers from scale insects and mealybugs nestling along its rhizomes. Spider mites may appear in heated, dry rooms. Fungus gnats can breed in the mix if it stays wet. Keep the rhizome area clean and well-ventilated.
How do I get rid of scale insects on commutatum fern?
Brown shell-like bumps on stems and rhizomes; sticky residue; fronds discolour and drop Manually scrape or swab with alcohol; treat with horticultural oil or insecticidal soap; repeat every 10–14 days
How do I get rid of mealybugs on commutatum fern?
White woolly tufts at growth points and rhizome intersections; honeydew present Remove with an alcohol swab; apply diluted neem oil spray every 7 days for 4 weeks
How do I get rid of fungus gnats on commutatum fern?
Larvae damage shallow roots; adults swarm around the pot base; plant may show unexplained wilting Let the top layer of mix dry out; use yellow sticky traps; drench with Bti-based biological larvicide