Pest identification
What's eating my tongue fern?
Scale insects
Signs: Hard brown or tan bumps on frond surfaces and along the rhizome; yellowing and poor growth
Control: Scrape off manually; dab with 70% isopropyl alcohol; apply horticultural oil or neem oil spray every 10 days
Mealybugs
Signs: White woolly deposits on rhizome and frond bases; honeydew and stunted new fronds
Control: Remove with alcohol-soaked cotton; spray with insecticidal soap; repeat weekly for 3–4 weeks
Spider mites
Signs: Fine stippling and webbing on frond undersides; worst in hot, dry indoor conditions
Control: Mist foliage and increase humidity; spray with neem oil or insecticidal soap solution; isolate if severe
Keep tongue fern pest-free
Healthy plants resist pests best. Get the basics right:
Tongue Fern pests — FAQ
What is eating my tongue fern?
Tongue Fern (Pyrrosia lingua) is a tough, drought-tolerant houseplant but still attracts scale insects that anchor themselves to its thick, strap-like fronds. Mealybugs shelter in the creeping rhizome. Spider mites can appear in dry air. The leathery fronds may hide infestations — check both surfaces and the rhizome.
How do I get rid of scale insects on tongue fern?
Hard brown or tan bumps on frond surfaces and along the rhizome; yellowing and poor growth Scrape off manually; dab with 70% isopropyl alcohol; apply horticultural oil or neem oil spray every 10 days
How do I get rid of mealybugs on tongue fern?
White woolly deposits on rhizome and frond bases; honeydew and stunted new fronds Remove with alcohol-soaked cotton; spray with insecticidal soap; repeat weekly for 3–4 weeks
How do I get rid of spider mites on tongue fern?
Fine stippling and webbing on frond undersides; worst in hot, dry indoor conditions Mist foliage and increase humidity; spray with neem oil or insecticidal soap solution; isolate if severe