What kills gnats in the bark?

[Pantsonfire]

Look for a product called "mosquito dunks". You want the ones that contain Bacillus Thurengensis Israeliensis, it will the fungus gnat larvae when they eat it. I keep one in a big bucket of water that I then use to water the plants. Biological warfare on bugs.
Works like a charm.

[Tommyr]

Originally Posted by Pantsonfire

Look for a product called "mosquito dunks". You want the ones that contain Bacillus Thurengensis Israeliensis, it will the fungus gnat larvae when they eat it. I keep one in a big bucket of water that I then use to water the plants. Biological warfare on bugs.
Works like a charm.

Agreed! It's MY method as well as the sticky traps for the adults and some Sundews and Mexican Butterworts!