Fungus Gnats on Mass Cane: Overwatering Is the Cause, Drying Is the Cure

Gnats = Overwatering

Black flying bugs (fungus gnats) and their larvae (tiny worms) appear because the soil stays too wet, even if the surface feels dry.

Fix the Root Cause

1. Water with straight rubbing alcohol to kill larvae (safe for roots).
2. Then let the plant dry until soil feels dry AND pot feels light.
3. Water thoroughly, then empty drainage tray after 2 hours.
4. Next repotting: use ½ potting soil, ½ perlite for faster drainage.
5. Don't repot before April 1st; max 10-inch pot.

Keep it drier—gwon't return.