Pest identification
What's eating my wart fern?
Scale insects
Signs: Hard or soft bumps on the leathery fronds and creeping rhizomes; sticky honeydew; yellowing or browning fronds
Control: Scrape off with a soft brush; apply neem oil or 70% isopropyl alcohol swab; repeat every 7–10 days for 4–6 weeks
Mealybugs
Signs: White waxy clusters tucked into rhizome joints and frond bases; reduced growth; honeydew residue
Control: Remove with alcohol-soaked cotton; apply insecticidal soap spray; isolate and re-treat weekly for a month
Spider mites
Signs: Fine webbing on frond undersides; bronze stippling on frond surface; worse when air is hot and dry
Control: Increase humidity; wipe fronds with a damp cloth; apply neem oil or insecticidal soap weekly for 3 weeks
Keep wart fern pest-free
Healthy plants resist pests best. Get the basics right:
Wart Fern pests — FAQ
What is eating my wart fern?
Wart Fern (Microsorum scolopendria) grown indoors is most commonly attacked by scale insects, which cling along the leathery fronds and the creeping rhizomes. Mealybugs can hide in the rhizome folds. Spider mites occur in low humidity. Because the rhizomes sprawl across the pot surface, check them carefully during every watering for early signs of pest activity.
How do I get rid of scale insects on wart fern?
Hard or soft bumps on the leathery fronds and creeping rhizomes; sticky honeydew; yellowing or browning fronds Scrape off with a soft brush; apply neem oil or 70% isopropyl alcohol swab; repeat every 7–10 days for 4–6 weeks
How do I get rid of mealybugs on wart fern?
White waxy clusters tucked into rhizome joints and frond bases; reduced growth; honeydew residue Remove with alcohol-soaked cotton; apply insecticidal soap spray; isolate and re-treat weekly for a month
How do I get rid of spider mites on wart fern?
Fine webbing on frond undersides; bronze stippling on frond surface; worse when air is hot and dry Increase humidity; wipe fronds with a damp cloth; apply neem oil or insecticidal soap weekly for 3 weeks